* In ''TsubasaReservoirChronicle'', BigBad Fei-Wang Reed explains "Syaoran" Li that the two have are wishing to obtain the same wish (reviving a dead person) the two have brought miseries to the people around them. In the story nobody ever denies this and the final chapters solidify this. However, it should be noted that "Syaoran" was just a puppet of Fei-Wang all along.
* At least once in ''DragonballZ'', [[BigBad Frieza]] tells [[TheHero Goku]] that they're alike, going so far as to point out that, as a [[SuperpoweredEvilSide Super Saiyan]], Goku is as much a beast as he is.
** Although neither knows it in the original Dragon Ball the nameless namek and Goku are very much a like. Both are aliens from worlds that were in distress, one being outright destroy, they both were raised in isolation away from the civilize world, lost their memories of their old home, and had come to see the blue planet as their home. Their arrival on Earth also greatly impacted the planet changing it forever. The different between them is that the unnamed namek because tainted by the violent nature of humankind and to purified himself to become guardian he split into two beings; [[BigGood Kami]] and [[TheBigBad Piccolo]]. Goku actually got tamed by humanity by his grandfather after he lost his memory and inheritance most of the good qualities of humans making him kindhearted compare to the rest of his species.
* ''Anime/TheBigO''
** BigBad Alex Rosewater never gets sick of pointing out that hero Roger Smith is just as arrogant, power-hungry, and obsessive as he is, for manipulating a giant robot to fulfill his personal moral agenda.
*** Except Alex's interpretation can be considered wrong considering that Roger [[IWasJustPassingThrough intentionally puts on the air that he is just a business man and saves people by way of business.]]
** In episode "Eyewitness" Angel tells Roger Smith that they're not so different.
* In ''TowerOfGod'', [[SmugSnake Kim]] [[ArcVillain Lurker]] sees the parallels between him and TheHero [[HotBlooded Ja Wangnan]]. They both [[spoiler: had their dreams toyed with and both have sacrificed a lot of people to get where they were]].
** We have inter-faction political rivalry of epic proportions. Good luck trying to work out how much lower any of them will stoop in comparison to any other given one. Or, which you'd pin a "Good Guy" sticker on at any given minute: they're all about as [[GreyAndGreyMorality good or as bad as each other]]. Many individuals break down into this, as well: even some truly horrible characters have friends they care about. And, others that seem consistent and honourable one minute will turn around and cut somebody else off at the knees the next.
* ''Anime/MazingerZ'': [[BigBad Dr. Hell]] as a white-haired, LargeHam, ObviouslyEvil MadScientist built HumongousMecha. So was [[TheProfessor Dr. Kabuto]] in the original manga. The difference between both was Hell wanted to TakeOverTheWorld for himself, whereas Kabuto suggested [[TheHero his grandson]] [[http://www.mangareader.net/735-34819-35/mazinger-z/chapter-1.html making just that]]. This was intentional, since Creator/GoNagai intented to show Mazinger-Z was a machine, hence he could have just so easily used for bad instead of for good.
** ''Anime/GreatMazinger'': He is a powerful warrior and accomplished swordsman, proud of their skills, that wants to protect his kind, and is capable of showing admiration towards someone who can match his skills, even if that person is an enemy. Both [[TheHero Tetsuya Tsurugi]] and [[TheDragon Ankoku Daishogun]] fit in that description. Really, the bigger difference between them is Tetsuya is human.
* Alviss and Rolan in ''MarchenAwakensRomance''. Both of them were orphans, victims of circumstances beyond their control. What differed was who took them in. Whereas Alviss was found by Dana/Boss, Rolan was found by [[TheDragon Phantom]], and their loyalties were based on those encounters. Alviss [[LampshadeHanging lampshades]] the trope in their battle in the finals, saying Rolan may have turned out more like him if it had not been Phantom who found him.
* Mugen and Jin in ''SamuraiChamploo''. Pointed out by Fuu within her diary, much to both's displeasure. They're both morally ambiguous [[BloodKnight Blood Knights]] who differ only in [[RedOniBlueOni personality]]. Although at first glance Jin appears to be the [[TheHero Standard Good Guy]] and Mugen appears to be the TokenEvilTeammate, the series quickly establishes that Jin is also cold, irritable, and arrogant (esp. in regards to Mugen) despite his noble bearing and fine words, while by the second episode Mugen is already showing some heroic tendencies and concern for Fuu despite his claims of being a loner and hating everyone. Additionally, both Jin and Mugen enjoy the company of prostitutes, both Jin and Mugen love to fight and never back down from a challenge, both Jin and Mugen become better people as a result of Fuu's quest... the list goes on.
* ''Anime/YuGiOhGX'': Yubel informs Amon during their duel that he's just like her -- they both destroy the ones they love.
* ''Anime/YuGiOh'' has several, but a notable one is in the DOMA arc. Raphael, one of Dartz's henchmen, is convinced that even the nicest people have darkness in their heart, and tries to prove this to Yami Yugi by making him play the Seal Of Orichalcos field spell card that feeds off of the darkness in people. [[spoiler:He succeeds, and wins as a result, in one of the most painful and depressing moments in the series.]]
* In ''Anime/TengenToppaGurrenLagann'' during Simon's final fight against Lordgenome, Lordgenome says, "There was once a man who fought as you do, unaware that his actions would lead to the universe's destruction." He's talking about himself, back in the day [[spoiler:when he and the other thousands of spiral warriors unsuccessfully waged war against the attacking Anti-Spirals (which the Dai-Gurren Brigade battle in the second story arc, only to succeed),]] stating that Simon and he are not so different in that respect.
** [[spoiler: The Anti-Spiral]] himself is also an example. He ''swears'' that his people [[spoiler: have no Spiral Energy and that he's opposed to Spiral Energy and anything it represents, yet during the final battle he suffers a VillainousBreakdown and ends up becoming HotBlooded himself.]]
** Early on, when Kamina first met [[CampGay Leeron]], he got creeped out and drew a blade on him. [[spoiler: After making a HeelFaceTurn and being recruited into Team Dai-Gurren, [[TheRival Viral]]'s reaction to Leeron was the exact same- although in the form of death threat from Gurren's cockpit.]]
* Spike and Vicious have a moment like this during their standoff in the ''Anime/CowboyBebop'' episode, "Ballad of Fallen Angels":
-->'''Vicious''': You should see yourself. Do you have any idea what you look like right at this moment, Spike?
-->'''Spike''': (with a savage grin on his face) What?
-->'''Vicious''': A ravenous beast. The same blood runs through both of us. The blood of a beast that wanders, hunting for the blood of others.
-->'''Spike''': I've bled all that kind of blood away.
-->'''Vicious''': ''Then why are you still alive?!''
** The anime also parodies this trope with Andy, Spike's one-shot {{foil}} whose similarities to the protagonist are so prominent as to be {{lampshade|Hanging}}d repeatedly by the remaining cast. Naturally, the two hate each other's guts with a passion -- well, Spike hates Andy's guts. Andy can't even [[UnknownRival remember Spike's name for most of the episode]], which only serves to infuriate the protagonist ''further''.
* James and Jessie of Team Rocket on ''Anime/{{Pokemon}}'' would likely be two of Ash's best friends if they didn't spend all their time trying to steal Pikachu. They've proven time and again that, like him, they are compassionate and caring trainers who respect their Pokemon, and the rare times that they do something that doesn't involve underhanded methods, they can actually be rather competent trainers. If they tried to catch Pokemon the legitimate way rather than stealing them, they could probably be successful... Probably.
* Happens a few times in ''Manga/FullmetalAlchemist''.
** When Edward confronts Shou Tucker over his use of his wife and daughter as subjects in his experiments, Tucker says Edward is just like him, because Edward used alchemy to try to bring his mother back.
** [[DefiedTrope Defied]] when Edward first fights Scar. Scar notes that both of them use their arms for destruction. Edward answers "[[ShutUpHannibal Don't you start! We're nothing alike!]]"
** An older brother sacrifices his right arm, so that his younger brother can live. Now, are we talking about Edward Elric, or Scar's older brother? Ed forces Scar to have a flashback to his brother, who did a similar thing to protect Scar. Scar is also a lot older to emphasize the bond between brothers that they share.
** Rare hero to villain instance: after Kimblee's [[spoiler:chimera underlings are defeated and tied up, Alphonse asks them if they really have no family or anyone who cares about them. They respond that, being half-human monster-things, they can't exactly go home again. Al takes off his head to show them he isn't a normal human either, and if he can hope to get his body back, so can they, talking them into a HeelFaceTurn]].
*** [[spoiler:Edward had a similar moment with the Slicer Brothers after beating them in the 5th Laboratory, refusing to kill them despite being AnimatedArmor just like Aló''precisely because'' they were AnimatedArmor ''just like Al''. Unfortunately, they got [[RedemptionEqualsDeath speared by Lust]] right before their ensuing HeelFaceTurn could have any effect.]]
** Greed gives one of these speeches to Ed not too long before the final battle, explaining how even though what Ed is wanting to do is seen as noble and Greed's goals are seen as selfish, both of them are at the end of the day motivated by desire, and that "greed" doesn't necessarily have to be evil. Also, when Greed first fought Ed, Greed taunted Ed for being the kind of person who doesn't mind getting beat up but flips out when people he cares about get hurt, and ironically Greed turns out to be exactly the same in that respect.
** May Chang comes from Xing's smallest and weakest clan, and her pet panda was also abandoned by its family for being small and weak. When hearing this, Scar decides to help find Shao May. Yoki explains this change of heart to May by drawing paralells to the Ishvalan Extermination where Scar's people were wiped out.
** {{Lampshaded}} in the [[Anime/FullmetalAlchemist 2003 anime's episode]] "The Phantom Thief":
--->'''Edward''': It's funny. Every crook I meet wants to tell me how much I'm just like them.
* In ''OutlawStar'', Harry [=MacDougal=] pulls one of these on [[spoiler: Melfina, to whom he reveals to her that he's also an ArtificialHuman, with all the CloningBlues that go with it.]]
* One of the big reveals in ''EndOfEvangelion'' is that humans share much of their DNA with their [[EldritchAbomination enemies]], the [[OurAngelsAreDifferent Angels]]. Misato remarks on the tragic irony behind the fact that each race wants to exterminate the other despite being so similar on a genetic level.
* ''Manga/DeathNote'': Both Light and L fall under this trope, engaging in roughly the same questionable activities in their cat-and-mouse game. For example, they both use criminals to test the power of the Death Note at least once during the story.
** Lampshaded several times in the story, especially with [[spoiler: L's true name: Lawliet, which is pronounced in Japanese like "low light."]]
** Matsuda and Light are also Not So Different, as Matsuda admits to having occasionally thought that the world would be a better place if some people weren't in it. Later on, he starts to become seriously worried by how much he sees the world as having improved with Kira around, leading to something of a GetAHoldOfYourselfMan (minus the hitting) moment on the part of the other policemen. Then you have [[spoiler:Mello, another detective investigating Kira]], whose actions in pursuit of Light are so dreadful that it's hard to say that he's any better than his foe. Really. He's a lot worse. So much that the police is willing to accept Kira's help to take him down.
** Near, who, [[spoiler:before officially taking on L's name]], is shown to be just as questionable in his methods as [[spoiler:his deceased predecessor]], if not more so. It's hard to go into detail, but a hotly debated issue is the accuracy of [[spoiler:Matsuda's theory that he controlled Mikami with the Death Note. Not helped at all by WordOfGod, which states that Near is "dishonest" and "the more evil" of him and Mello.]] But many have found him to be simply maligned by L-Fangirls who see him as a ReplacementScrappy
* ''Anime/{{Monster}}'': Dr. Gillen invokes this towards the incarcerated serial killers he interviews. Since his sins actually appear to amount to [[spoiler: being an emotionally distant husband, and getting competitive as a student to the point of cheating on ONE test, this seems a bit of a stretch.]]
* ''{{Negima}}'' turned to this during the school festival arc. Negi and his [[TrueCompanions group]] going [[TimeTravel back in time by ten]] days to "fix" [[BadFuture the future another traveler had created]], he reasoned that it was no different than her going backwards to change her own future.
** And again in the magical world when Tsukuyomi calls out Setsuna on her motivations for helping Negi.
** Negi and Fate Averruncus are also not so different from one another. [[spoiler: That's why they joined forces to save the Magical World.]]
* The final battle of ''[[Anime/MobileSuitZetaGundam Zeta Gundam]]'' has a couple of speeches along these lines. Played straight in the case of Kamille and Jerid, and played rather strangely in the case of Reccoa and Emma. Also, there is a really nice scene in a theater...
* In the anime version of ''{{Pretear}}'' [[BigBad Fenrir]] even says at one point that Himeno is going to repeat her fate -- to which Himeno immediately objects. [[spoiler:Not only Fenrir actually got her powers from being in the same position as Himeno, she turned evil because of her unrequited love for the same person Himeno is in love with.]]
* ''Anime/AstroBoy'' gets to hear one of these speeches every time he tangles with Atlas or Blue Knight. In fact, in Blue Knight's case it actually worked for a while.
* Late in ''Anime/CodeGeass'', Jeremiah Gottwald asks Sayoko Shinozaki if it's chivalry (the same code of loyalty that he's tried to live his life by) that makes her remain loyal to Lelouch, despite being Japanese herself, and she agrees that this is probably the reason. Considering they spent the vast majority of the series on opposing sides, and tried to kill each other the first time they crossed paths, it counts. Both are much beloved {{Ensemble Darkhorse}}s so the idea of them being a pairing soon entered {{fanon}} via MemeticMutation based ENTIRELY on this small speech.
** Much more important is the ending: [[spoiler:When Lelouch and Nunnally confront one another, Nunnally reveals that she accepted control of the Damocles in order to focus all the world's hatred on the WMD-flinging space fortress, so that people could finally unite and move towards peace. As we learn at the final episode's climax, Lelouch had the exact same plan - except that he made ''himself'' the object of hatred, and then allowed himself to be killed so humanity as a whole could move on.]]
** As {{foil}}s of one another, it's obvious to the audience that Lelouch and Suzaku are NotSoDifferent, and there are a number of instances when they realize this in the show. One obvious example in ''R2'' being [[spoiler:during the meeting at the Kururugi shrine, when Suzaku sees through Lelouch's lies because he recognizes that, like him, Lelouch is pained by having to cover things up in order to make the world better. Because of [[MagnificentBastard Schniezel]]'s interruption, it's still a few more episodes before they actually manage to reconcile.]]
* Manga/{{Naruto}} and Gaara. Their arc (and their [[spoiler:friendship]]) actually bases on them being NotSoDifferent. This also happens in ''way'' too many fillers in the anime, particularly in the Temple of Fire filler with Sora. Not only did they initially start out as outcasts in their respective communities, but Sora even has '''part of the Nine-Tailed Fox's chakra''' within him. Also, in the ''Ultimate Ninja'' game, if you select Hinata's history mode, when you face Sakura she'll say that Hinata reminds her of how she used to be shy before meeting Ino, fighting you/Hinata for a good challenge, and offer encouragement and comfort if you/Hinata lose.
** [[spoiler:Pain]] also pulls this off in his fight with Naruto, pointing out that they both act out of their sense of justice and that they both desire peace, even if their methods are different.
** In chapter 485, Naruto admits that he isn't too different from [[spoiler: Sasuke, since he once harbored thoughts of revenge against the Leaf Village for his shabby treatment]]. He claims that [[ForWantOfANail if things had been a little different]], their positions could have been switched.
** In chapter 581 [[spoiler:Kabuto says he and Sasuke are not so different because they both wish for the destruction of the Leaf Village. In response, Sasuke says "I'm not like you".]]
** Don't forget Gaara telling Sasuke this as their eyes really matched their purpose of life: revenge.
** In an interesting twist, one of Tobi's goals apparently is to make Naruto ''more like him''. [[spoiler: And given that he's actually Obito Uchiha, the good-natured knucklehead of Kakashi's genin team before he suffered a FreakOut, this is probably a case of IHatePastMe.]]
* [[BigBad Jail Scaglietti]] of ''MagicalGirlLyricalNanoha'' uses as the basis of his BreakThemByTalking the assertion that Fate's [[ActionMom adopting children]] who would become ChildSoldiers that loved her makes her no different from [[MadScientist Jail himself]] or her EvilMatriarch of a mother. Erio and Caro, the children in question, respond with a YouAreNotAlone speech about how they're the ones who chose their path and that all Fate did was raise them to be strong-willed enough to do so, [[HeroicResolve which gives Fate the strength]] to take Jail and his Numbers down in a SugarWiki/CrowningMomentOfAwesome. (Ironically, it turns out that Jail is right about himself and Fate being similar, just not in the ways he thinks: both are [[spoiler:ArtificialHumans who [[GoneHorriblyRight exceeded design expectations]] and [[TurnedAgainstTheirMasters took down their own creators]]. Too bad for Jail that ''he'' was Fate's creator]].)
** In A's, during Zafira's third fight with Arf in Episode 7, he says that he will serve his mistress regardless of whether what he's doing is right. He then says "You're the same type of beast as me... can you say you're any different?" While he is a guardian beast and Arf is a familiar (which Arf herself says is a difference only in terminology), he has a point considering that Arf had helped Fate gather the Jewel Seeds in the first season. Arf is left unable to articulate a response.
* Tetsunosuke and Suzu from ''PeacemakerKurogane'', although constantly pushing each other's buttons and being [[TheRival rivals]], are shown to think to themselves that maybe they're not so different after all. At least until [[spoiler: Suzu goes [[AxCrazy insane]] and [[StalkerWithACrush obsessed with Tetsunosuke]]...]]
* A variation: Habashira Rui and Hiruma have a moment in ''{{Eyeshield 21}}'' where Habashira asks why their paths are so different when their methods are the same.
* In ''OnePiece'', done inadvertently by Sanji when fighting Absalom: Not only they have a similar reaction to seeing a sleeping Nami in a wedding dress, but Sanji reveals that given invisibility powers, he would do little better than Absalom himself.
** It becomes a bit unnerving just how similar Luffy and Blackbeard were when they first met.
** It's been stated that both [[DishingOutDirt Crocodile]] and [[CastingAShadow Gecko Moria]] were very much like Luffy in their younger days. In this case, they seem to serve as reminders of what Luffy himself may become if, as Crocodile did, he allows the harshness of the world to make him abandon his dream, or, as Gecko Moria did, he fails to protect his TrueCompanions.
* Done with a positive intonation in ''{{Gaiking}} Legend of the Daiku Maryu''. When Lee actually meets a momentarily-blinded Vestanuu, she lets him know she fights simply because she and the others of Darius believe that humanity attacked first and they're justified in defending themselves.
* In ''Manga/YuYuHakusho'', Yusuke notices that he's some similarities with his opponent Jin, particularly enjoying fighting and a similar fighting style, and his acknowledging their similarities is slightly played up in the anime. [[spoiler:After dying at Yusuke's hands]], Toguro tells Genkai that Yusuke has the potential to become great, but might end up like him if Genkai doesn't make the right decisions.
** Happened with Hiei and Mukuro as well, with Mukuro recruiting Hiei for the sole reason they they both grew up with terrible lives, and living in Makai, where it's a constant struggle for survival, that's saying something. [[spoiler:Eventually (once Mukuro's [[SamusIsAGirl revealed to be a woman]]) blooms into something of a tempestuous romance.]]
** This is actually a major underlying theme in the story. Mainly in that demons are also NotSoDifferent to humans. Demons are a designated evil and have no obligations to being good. Thus often making themselves out to be more evil. [[OurDemonsAreDifferent Well, at least in this show]]. But the series then introduces many humans who are just as evil if not worse than demons and many demons who have proven to be truly good-hearted like Yukina. In the end chapters of the manga, for example, announcer girls Juri and Koto, known for not being afraid to commentate on carnage during the tournaments, find a natural affinity for television. It's a sign that more-disciplined demons who learn to play by the rules (the most basic rule: don't exploit humans) can be accepted by humans as being rather decent folk.
* In ''SDGundamForce'', Sazabi tries this on Captain near the end of their fight, in an attempt to lure him to the dark side. Captain's response?
-->'''Captain''': [[ShutUpHannibal If you want a friend... You'll have to do better than that!]]
* Subverted in ''CodeBreaker'' when an evil character says she was severely abused because of her powers, and a good character says that he too was abused. They go through a DefeatMeansFriendship moment [[spoiler: and then the evil character drops all the people she's frozen into a pit]]. It seems that Defeat has nothing on [[EvenEvilHasStandards treating someone like a human being]].
* ''LightNovel/{{Baccano}}'' goes for a not quite good, but not quite bad thing in "Drugs and Dominoes", when [[TheIngenue Eve Genoard]] finally encounters [[NobleDemon Luck Gandor]], the man who "[[AndIMustScream killed]]" her brother [[spoiler:after he killed three of Luck's friends, entirely unprovoked]]. Not only does she learn that he's not the monster she thought he would be but also that, given similar circumstances (namely, learning that [[spoiler:Gustavo]] killed her father and other brother for his own personal gain), [[BewareTheNiceOnes she would do the same without a second thought]] -- the only reason she didn't blow [[spoiler:Gustavo]]'s head off then and there was because of [[ShootTheDog Luck's intervention]].
** In [[BackStory 1711]], while agonizing at the possibility of [[ShootTheDog having to kill]] the envious fellow alchemist Szilard to protect some dangerous knowledge, Maiza asks "Are he and I really so different?" (As it turned out, they were different enough that Szilard completely lost his marbles and started killing people for the knowledge even while Maiza was still thinking it over.)
* In ''LightNovel/FullMetalPanic'', Sousuke is subject to this kind of BreakThemByTalking from Gauron in [[spoiler: "The Second Raid"]]. Gauron [[GreenEyedMonster gets pissed off]] that Sousuke has been trying to fit in with normal people and have [[TrueCompanions friends]], saying that it's making him "weaker", and that it's a hopeless goal to have. He proceeds to go on about how [[StalkerWithACrush they were a match made in heaven]], and that Sousuke shouldn't deny it. It eventually ends with Sousuke [[spoiler: shooting Gauron. Which was exactly what he was hoping for.]]
** In the manga, Leonard Testarossa asks Chidori why she is more afraid of him than Sousuke, saying that Sousuke has killed just as many, if not more people than Leonard.
* ''UruseiYatsura'': Ataru Moroboshi is a CasanovaWannabe and UnluckyEverydude, shunned by everyone, while his UnwantedSpouse Lum is a CuteMonsterGirl MagicalGirlfriend who is [[InstantFanclub immediately popular with all the other schoolkids]]. It's subtly hinted that part of the reason why Lum is attracted to Ataru (the other part being that she can recognize his [[JerkWithAHeartOfGold deeply buried noble qualities]]) is because they're much the same; Lum is also sneaky, mischievous, bad-tempered and uninhibited. The main reason she comes off as a {{Tsundere}} in their relationship is because Ataru keeps chasing after other women rather than pay attention to her, which makes her angry and jealous, rather than being angered by his perversion.
** Similarly, as much as [[BrattyHalfPint Jariten]] berates Ataru for his perversity and gets angry when Ataru hints at Ten's own lustful thoughts, he's really no better than Ataru, as he's well aware that being a cute little baby makes him much more attractive to the girls then Ataru.
*** The same with Mendou. He acts like he's the opposite to Ataru - respectful and chivalrous to the girls. However, he's really just as much of a pervert and prides himself on using his money, status, and good-looks to lead girls on. Lum, herself, even points this out and doesn't like Mendou because of how fake he is. And later, Shinobu realizes this and leaves Mendou behind.
* In ''{{Hellsing}}'' OVA 4, the Major pulls a double whammy. First he points out that if He allows the Major's evil to exist, then [[ChurchMilitant Iscariot's]] God must be [[GodIsEvil mad, or evil]]. When told "YoureInsane" for showing off the slaughter he's caused, he points out, "You sure didn't have a problem [[UsefulNotes/WorldWarII fifty years ago]]!" He ''is'' talking to [[KnightTemplar the Iscariot Organization]].
** Alucard also notes how similar he and the Major are, as they are both lovers of war who destroy their enemies and allies alike in pursuit of their mad ambitions. [[spoiler: The big difference between them turns out to be that, when offered immortality on the verge of death, Alucard accepted while the Major adamantly refused]].
** It turns out that the two who were really NotSoDifferent all along were, in fact, [[{{Dracula}} Alucard]] and [[BadassPreacher Anderson]], to the point that it ''[[spoiler: actually brings Alucard to [[TearsOfBlood bloody tears]] ]]''. Though the two originally had a RedOniBlueOni thing going on, Alucard appreciated him as his dearest enemy and tells him that [[spoiler: if Anderson killed him, he would be honored]]. That doesn't stop him from going full force against Anderson to test him, though...which ends up backfiring ''hard'' when Anderson uses a DeadlyUpgrade and essentially becomes a tool of God in order to finally kill Alucard. Alucard, who [[spoiler: sold his soul to the devil in order to live as a vampire, [[ManlyTears cries and]] ]] gets ''extremely'' pissed because he didn't want Anderson to [[spoiler: become a monster like him. After all, a monster of God is still a monster.]]
* In ''Anime/RevolutionaryGirlUtena'', [[ShadowArchetype Mikage]] (the villain of the second arc) points out that he and Utena are very similar. He can barely finish the sentence before she [[ShutUpHannibal punches him]].
* Afro and Justice from ''Anime/AfroSamurai'' becomes a clear case of this over the course of the series. Justice is the reigning BigBad, having killed Afro's father before his eyes when he was young boy. From that day on Afro led his life on the path of vengeance to kill Justice. While his reasonings for wanting to kill Justice is sound, Afro uses rather extreme measures to achieve his goals essentially making him a VillainProtagonist. By the end of it, the viewer comes to realize the only thing that really sets Afro apart from the BigBad Justice is that Afro is simply the viewpoint character. It was even stated by WordOfGod that Justice had his own legitimate reasons for killing Afro's Father, making Justice a DesignatedVillain more than anything else.
* ''GunslingerGirl'': Triela comes to think this of DistaffCounterpart Pinocchio (the young assassin she'd dedicated herself to killing) at the end of ''Il Teatrino''. Flashbacks reveal that their backstories are remarkably similar -- both are victims of child abuse rescued by their surrogate fathers, and who judge their own worth solely by their ability to kill for that 'father'.
* In ''{{Slayers}}'', it is revealed that the only differences between Gods/Shinzoku and Demons/Mazoku is the type of emotions that feeds them and the magic that can be called upon from them (Shinzoku being [[HolyHandGrenade HolyMagic]] and Mazoku being BlackMagic.)
* In ''Manga/{{Bakuman}}'', [[spoiler:Nanamine]], having revealed his [[SmugSnake true]] [[ManipulativeBastard colors]], tells the main characters, whom he's a fan of, that they should understand his lack of trust in editors and plan to get ahead by releasing his rejected one-shot online and consulting 50 people for advice by saying that they had to defy their editors and make waves in the past, and that "Tanto," a work that they were dissatisfied with enough to want to end, is the result of them listening to their editor.
* In the ''{{Berserk}}'' manga, Puck chastises Guts - who at the time is [[HeWhoFightsMonsters just as vicious as the monsters he hunts for]] - for being so cruel to Vargas, a kind but revenge-driven man who wants the apostle [[spoiler: who mutilated Vargas and forced him to watch as he ate his wife and children]] dead, saying that they weren't much different and should consider each other allies. Guts laughs it off, but later [[spoiler: reconciles to himself that he and Vargas weren't so different after all, since he and Guts [[ForcedToWatch shared the same cruel fate when encountering apostles]].]]
** Another, very disturbing one is the result of FridgeHorror. [[spoiler:Look what Femto did to Caska and Guts during the Eclipse, now look back at volume 3, where Guts is forcing young Theresia to watch as he brutally tortures her father (The aforementioned Count, who himself is quite the TragicVillain) right in front of her]]. It causes me to shiver everytime I remember, because you can just ''see'' how close Guts is to turn into what [[spoiler:Griffith]] had become!
** Also appears in the non-canonical video game ''Sword of the Berserk: Guts' Rage'', when it is revealed that both Guts and Balzac, the game's antagonist, had not-so-different [[StarCrossedLovers tragic love stories.]]
* ''Manga/{{Bleach}}'':
** Once the enmity ends between Ichigo and Uryuu, it becomes very clear, very quickly that the two are not so different. Neither of them are willing to accept such a claim but, while the pair may look dissimilar on the surface, everyone in-universe who knows them can see just how alike they really are. It's a source of great amusement for their friends, in fact.
** Subverted between Kyouraku and Starrk. Assuming this is part of why Starrk loses, as he starts to assume too much about Kyoraku's methods until Kyouraku reveals that he may share Starrk's BrilliantButLazy tendency, but the truth is that he's a ConfusionFu personality which Starrk dislikes.
** A major one for the Thousand Year Blood War Arc. Vandenreich leader Yhwach reveals that Yamamoto was once every bit as brutal as him, something both are aware of but hold in different perspectives.
* Heaven Canceller in ''LightNovel/ACertainMagicalIndex'' points out to Accelerator that he and Touma are not all that different in their determination to protect those they care about.
** A few characters {{lampshade|Hanging}} how both sides of ScienceVsMagic have similar methods and goals. For example, Academy City's goal of creating a Level 6 Esper through science is similar to the teachings of UsefulNotes/{{Gnosticism}}.
** Touma and Othinus come to this conclusion about each other after their conflict in New Testament 9. [[spoiler:Othinus trapped Touma in a series of horrible alternate worlds in an effort to break his will, but it helped him realize that she had also been cast out of her original world and had been trying to get back. She considers him the only person who understands her.]]
* ''Manga/BlackLagoon'': Between Rock and Balalaika.
* LeijiMatsumoto really loves this trope, but it's more obvious in ''GalaxyExpress999'' (in fact, the series revolves around the concept that the only difference between humans and mechanized people is that the mechanized people feels less limited by their robotic bodies).
** Played horribly straight in ''UchuuSenkanYamato''. For most of the first season we are repeated that the Gamilas are evil for what they've done to Earth and Mankind, but when the ''Yamato'' is about to reach Iskandar we find out that the Gamilas did what they did because they had no other choice but to adapt Earth to them if they were to survive, and that included the extinction of Earth's original life forms. Kodai has to acknowledge the NotSoDifferent angle after the battle to reach Iskandar has [[spoiler: devastated Gamilas and destroyed its cities, killing billions, by the very actions of the ''Yamato'' crew]].
*** The leader of Gamilas, Dessler, also falls into this trope in the series followup, the TV series 2. After being TheDragon for the Comet Empire, Dessler realizes after the end of combat with Yamato that Kodai cares as much for Earth as Dessler did for Gamilas. Thus began the HeelFaceTurn...
* ''NadiaTheSecretOfBlueWater'': When Jean and Hanson stop fighting over the blue water, they realize they're both mecha geeks and simultaneously {{squee}} over the Nautilus. For the last seven episodes, these two have been antagonistic but thanks to EnemyMine they become good friends.
* A variant occurs in ''GundamSEED'' when Uzumi Nara Atha, leader of the neutral nation of Orb, notes that the warring factions of ZAFT and the Earth Forces, are not so different; both are genocidal regimes who are unwilling to compromise or seek a mediated solution. He draws particular paralells between their leaders, the [[PunyEarthlings Natural-hating]] [[GeneralRipper Patrick Zala]] and [[DesignerBabies Coordinator-bashing]] Muruta Azrael. Both men would go ballistic if they heard this.
* In MaiHime, Natsuki realizes that she is NotSoDifferent from her bitter enemy Nao when Nao reveals that her father was killed and her mother was rendered comatose in a robbery, leading her to trick men into soliciting her for EnjoKosai and robbing them in revenge and for her to distrust anyone other than herself. Natsuki lost her mother at a young age and her father abandoned her, leading her to be similarly vengeful, as well as distrustful of others until she met Shizuru. As a result of this, [[spoiler:Natsuki prevents Shizuru from finishing off Nao after destroying her Child, in spite of everything Nao did to her]].
* ''Manga/InuYasha'': [[TheHero Inuyasha]] and [[AloofBigBrother Sesshoumaru]] turn out to be this. They even follow the same CharacterDevelopment path (although it takes Sesshoumaru longer and the anvils dropped on his head need to be more vicious to get him to pay attention). This is lampshaded a couple of times in the manga, usually PlayedForLaughs, such as when [[UltimateBlacksmith Toutousai]] deliberately [[TricksterMentor provokes]] the pair into trying to kill each other then complains that their identical short tempers prove they're brothers.
* For all their bickering, Tiger and Hare in ''Anime/MonsterRancher'' are this. Both are [[JerkWithAHeartOfGold Jerks With A Heart Of Gold]]. They are quite prideful and can be overconfident at times. They started out stealing/conning people to get money before meeting Genki and Holly. They are quick to insult and mock each other but [[VitriolicBestBuds they will leap to the other's defense]] when the occasion calls for it.
* Shinji tries to pull this on Rin in the ''FateStayNight'' manga, but it kinda falls flat since she never considered harvesting souls for her Servant. Rin just [[ShutUpHannibal punches Shinji in the face, tells him not to lump her together with the likes of him and calls him disgusting]].
* Tomoe and Nanami, the two main characters from ''Manga/KamisamaKiss'' come from radically different backgrounds (Tomoe is a LittleBitBeastly {{Kitsune}} familiar to a Shinto God and Nanami is an OrdinaryHighSchoolStudent) and have very different personalities (Tomoe is a JerkAss while Nanami is a Type B TsunDere). However, as the story progresses we eventually see they have more than a few things in common. Namely both have pretty bad tempers, both speak their mind no matter what the situation calls for, both have a rebellious streak in them and don't behave like society expects them to. They also have had similar experiences in life: both have lost a loved one that they deeply cared about, both were abandoned by someone they trusted and they are both disliked in their own worlds and in the divine world.
* In ''Manga/HeavensLostProperty'', Ikaros shares moments of this with Chaos and Hiyori. With Chaos because [[WhatIsThisThingYouCallLove they both had difficulty understanding what love is]], and with Hiyori because they were both given powers they never asked for and they both have feelings for Tomoki.
-->'''Hiyori''': You were right. We are the same. We don't want...
-->'''Ikaros''': ... the boy we love to die.
* ''Manga/BokuraNoKiseki'': After Yanuma loses it and attacks Meguro in a desperate bid to get people to respect him, the main character Harusumi has a moment of this. He says that Yanuma's desire to force everyone to respect him with his [[PastLifeMemories rank in the past]] and his superior magic is similar to the desire Harusumi had back in the prologue to attack the people who were bullying him with dangerous magic.
* Nena Trinity and Louise Halevy in ''MobileSuitGundam00'' qualify. In the first season, Nena shoots at Louise's family in frustration over having to work while others have fun, crippling her and killing the rest of her family. In the second season, Louise lets her hatred and desire for revenge rule over all her actions as she oversees the massacres of thousands. Eventually, the two meet after Louise's SuperPrototype Regnant ambushes Nena's [[SoLastSeason outdated Throne Drei]]. Hearing Louise's desire for revenge, Nena counters by saying she is doing the exact same thing, since she lost her brothers soon after the wedding massacre (and had to live an even worse life than Louise). Unfortunately for Nena, because she was the one who killed Louise's family, Louise shrugs off her comments and plea for life by citing that she will never forgive her... and kills her brutally. The end result shows Louise now as disturbed and psychopathic as Nena, and Louise pays dearly for it in the movie.
* In ''LightNovel/TheFamiliarOfZero'', humans and elves had FantasticRacism toward each other. Several characters learn that other than cosmetic differences, humans and elves behave almost the exact same way in similar situations. Arie, an elf with a great hatred for humans, eventually befriends Guiche when he sees that Guiche's interactions with his girlfriend Montmorency mirror his own interactions with his girlfriend Luctiana.