* ''WesternAnimatin/AdventuresOfTheGummiBears'': Despite their opposing moralities, [[BigBad Duke Igthorn]] and his brother [[WhiteSheep Sir Victor]] still strongly resemble each other (and not just physically):
-->'''Igthorn:''' I've decided to tell the whole world that we are brothers!
-->'''Victor:''' No... you wouldn't?
-->'''Toadie:''' Yes, he would.
-->'''Igthorn and Victor:''' Will you butt out?!
-->'''Toadie:''' Yep, they're brothers.
* ''WesternAnimation/AmericanDad'': Subverted in "Weiner of Our Discontent" when Roger and Stan find that they both like to feel important:
-->'''Roger''': We're not so different, you and I.
-->'''Stan''': Yes we are. We're night and day. Except for in this specific instance.
** Also Stan belittles Steve for being nerdy and unpopular, while flashbacks reveal that he was just as nerdy and more unpopular. Indeed, a major facet of Stan's character is how he wants Steve to be cool and popular like he never got to be (not becoming athletic until college), and Stan gets very upset whenever he discovers he is not liked by people, and is desperate to be accepted among his colleagues at times because of his past.
** Played straight when Stan kidnaps the children of a lesbian couple. When he hears them fighting in the backseat, he realizes that they are no different from his own kids.
* ''WesternAnimation/AvatarTheLastAirbender'': Parallel plots frequently point out that the hero, Aang, and WorthyOpponent, Prince Zuko, are not so different, but any stress spent over the situation [[spoiler:pre-HeelFaceTurn]] was on the dark AntiVillain prince's part, not the hero's. [[spoiler:Zuko and Sokka]] also get their NotSoDifferent episode in "The Boiling Rock".
** Zuko and Azula also have shades of this as well. Both desire love from their parents, both are amazing firebenders through different means (Zuko through his travels and lessons from Iroh, Azula's natural talent and additional hard work to get her form correct), both are hilariously socially inept with almost no social skills (remove the "almost" from Azula), and they have a love for their Nation.
** In the interquel graphic novel ''ComicBook/AvatarTheLastAirbenderThePromise'', Toph nearly gives up her metalbending school because she fears that she's not so different from [[WhyCouldntYouBeDifferent her parents]], by expecting her students to be something they're not.
** Used twice in the sequel's first season, ''WesternAnimation/TheLegendOfKorra''. After [[spoiler: Tarrlok puts the city under martial law and arrests innocents]] Korra storms into his office, pointing out how he's simply using his abilities and powers to intimidate others. Tarrlok points out that's exactly what ''she's'' here to do, and how she goes to the exact same extremes as him. Although initially wounded by his claim, she throws back that ''he's'' no different from Amon, the BigBad that he's opposing. [[spoiler: Its a subtle foreshadowing for how Amon and Tarrlok turn out to be brothers]].
** Used once again in Season 4, to greater effect. A rare hero to villain example this time round when Korra tells the BigBad Kuvira that despite their differences, they have a lot of similar qualities, [[spoiler:which helps Korra [[HeelRealization talk Kuvira down]]]]. Their connection was highlighted earlier in the series when Korra seen her own face in Kuvira's, and Bolin (before learning about Kuvira's darker side) even tells Mako that she and Korra are similar. The forth season also goes to show how Korra's ideals and beliefs are similar to all the previous villains. Very often whenever a villain is defeated in the Avatar series, the protagonists tend to achieve the villains goals (except for the Red Lotus's) in a much more peaceful manner.
** When we first meet the airbending StreetUrchin Kai, Mako and Bolin realize that he's a lot like them during their time on the streets. They have different reactions to this though, Bolin sees him as a little brother figure while Mako is mistrusting of him.
** Kuvira and Suyin have a shared belief that monarchies are obsolete, likely from the time Kuvira spent as Su's surrogate daughter. The difference is, while Su didn't want to impose her beliefs on others, Kuvira's well-meaning attempt to rebuild the Earth Kingdom eventually led her to become a dictator.
** After Kuvira establishes the Earth Empire and tells Wu that the legacy he's spent his life believing was his destiny is now obsolete, he has a nervous breakdown that mirrors Korra's concern over her own destiny not having any meaning anymore.
* ''WesternAnimation/BatmanTheAnimatedSeries'':
** One episode involves a Japanese ninja stealing the secret of a "deadly touch" technique and facing off Batman for a climactic fight. Batman, himself trained as a ninja, is forced to hear the villain claim this trope. In response, he tells the guy that today, he's fighting as a samurai not a ninja. (Later, when Bruce talked to his [[OldMaster sensei]] about it, the old man put his doubts to rest, denying that Batman was anything like a ninja at all, pointing out that he had tried to rescue his foe and refused to use the "deadly touch" technique himself, despite knowing how to. In other words, Batman had the one thing a ninja lacks: honor.)
** In ''A Bullet for Bullock'', after admitting he bends the law to get results, the titular detective remarks that he and Batman aren't so different. Naturally, as the two despise each other, this pisses Batman off. He's right, too. while Bullock ''is'' a crude dislikable oaf, he's not corrupt in the slightest and a surprisingly competent cop. Ironically, what he and Batman have most in common is the law puts up with both of them (and they each put up with each other) because they both definitely get results.
* In the series premiere of ''WesternAnimation/BatmanBeyond'', Terry convinces Bruce not to stop him by appealing to [[DeathByOriginStory their common loss]]:
-->'''Bruce:''' I'll shut down the suit again and this time, it'll be for good.\\
'''Terry:''' I read up on you, Mr. Wayne. I know how you lost your folks. The guy who murdered my dad is on that transport. This is my one chance to nail him.\\
''[[{{Beat}} (pause)]]''\\
'''Bruce:''' The hover pads are in the north-east sector.\\
'''Terry:''' Wish me luck.\\
'''Bruce:''' Good luck.
** In a third-season episode, Bruce and Terry return Fingers (a gorilla given human-level intelligence) to Africa, where he declares his intention to protect his home from poachers. When Terry expresses concern that Fingers knows [[SecretIdentity who they are]], Bruce says that he isn't worried:
--->'''Bruce:''' He's a kindred spirit if I've ever seen one.
* {{Subverted}} on ''WesternAnimation/BatmanTheBraveAndTheBold''--when [[ParentalAbandonment orphaned]], [[FriendlessBackground friendless]] [[ComicBook/{{Shazam}} Billy Batson]] meets his EvilCounterpart, Black Adam, he thinks of him as the closest thing he has to some sort of family and is convinced there must be some good left in him. It...doesn't really work out, though Billy gets a [[LongLostRelative different happy ending]] anyway.
-->'''Billy:''' He was a [[TheChosenOne Champion]]. Like me.
-->'''[[TheChooserOfTheOne Shazam]]:''' A Champion, yes. [[APupilOfMineUntilHeTurnedToEvil But not like you]], young Billy. [[IncorruptiblePurePureness Not like you at all]].
* In ''WesternAnimation/BeastMachines'', when Rattrap agrees to defend Megatron for a night in exchange for weapons (ItMakesSenseInContext), Megatron tries to entice him to change sides by saying "You have the makings of a fine Vehicon." Rattrap eventually defies him, saying "Not from where I'm standing".
** In a later episode, Optimus Primal intends to use the Plasma Energy Chamber to shut down all technological systems on Cybertron. Cheetor points out that this is no different to Megatron.
* ''WesternAnimation/{{Ben 10}}'' and Kevin 11. While the former type was pleasantly {{averted|Trope}} in their ForcedPrizeFight episode, the latter type started from Kevin's first appearance:
-->'''Ben''': ''(under his breath)'' You don't care about anyone but yourself.\\
'''Kevin''': You talking about me?\\
'''Ben''': No. I'm talking about ''me''!
** In ''[[WesternAnimation/Ben10SecretOfTheOmnitrix Secret Of The Omnitrix]]'', Azmuth is shown to be immature, selfish, and kind of a jerk, but he's ultimately helpful when he really wants to be... Kinda like Ben, really. When he asked Ben if he wanted to learn about the Omnitrix like a "true hero" would, Ben said he didn't want to, Azmuth didn't tell him the code, but, he did say:
-->'''Azmuth''': Heh, I like that boy.
** Azmuth himself did state that he was like Ben when he was younger (given how old Galvans can live to be, hard to tell when that was) and both of them have green as their favorite color.
** ''WesternAnimation/Ben10UltimateAlien'' has an example with Captain Nemesis:
-->'''Ben''': *furious* Did you forget? This isn't about fame! It's about helping people!
-->'''Julie''': You are talking about him, right?
** The [[ShadowArchetype First Forever Knight]] pulls this on Ben, stating how despite them both being heroes with humanity's best interest at heart, they're still doubted by those they protect, even when they truly know what's best. This convinces Ben to achieve a compromise with him.
** In the GrandFinale of ''Ultimate Alien'', ''Vilgax'' of all people claims he and Ben aren't so different since they both use power to impose their will on the universe. Vilgax attempts to corrupt Ben into being a tyrant just like him [[spoiler:''and it almost works.'' Good thing there were others there to talk him down before it did.]]
* This concept takes a serious twist in the ''WesternAnimation/CodenameKidsNextDoor'' episode "Operation: M.A.U.R.I.C.E.", where it's combined with YouCantFightFate. When it appears that Maurice has sided with Cree, Numbuh Five is almost ready to give up, consigned to the fact that she'll likely end up just like her sister, given the fact that she's nearly a teenager already. And Cree almost seems happy that Numbuh Five thinks this way, possibly thinking that reconciliation between them might be possible if that happens. As it turns out, however, [[spoiler: Maurice is actually a FakeDefector who has secretly continued to support the KND after everyone assumed he was decomissioned. After he trusts Numbuh Five with this secret to ensure that she never gives up, she realizes that she can ScrewDestiny, and not turn out like her sister at all.]]
* Elise in ''WesternAnimation/DanVs.'' is Dan's biggest critic but is also the one character who is just as ruthless when it comes to pursuing revenge. In the first episode, she shares Dan's grudge against New Mexico. In the childhood flashback explaining why she hates the state, she even let out a SkywardScream just like Dan does [[OnceAnEpisode every]] [[RunningGag episode.]]
** When Elise and Dan have to go to jury duty, they both do a SkywardScream at the beginning of the episode.
** Elise originally wanted to send a bunch of kids to work in factories in North Korea where no one would find them because they blow up her and Chris' car. You know who else wanted to get DisproportionateRetribution because someone ruined his car? Dan.
** Another episode has him comparing himself to a (female?) dinosaur, who he initially wanted to get revenge on for [[RunningGag destroying his car,]] since they both like eating junk food, watching television and wanted to be left alone. Earlier in the episode, when she damaged his car, he said "I hope you have good insurance" and "we're supposed to be exchanging information" when she runs away. He then says he intends to make her pay, but not with money since [[CaptainObvious she's a dinosaur and likely doesn't have any]]. At the end of the episode, [[BrickJoke she received an invoice in the mail from Dan, for the damages.]] [[CrowningMomentOfFunny She also]] does Dan's signature SkywardScream.
* Vlad Plasmius, being ''WesternAnimation/DannyPhantom'''s EvilCounterpart, loves messing with him this way:
-->'''Plasmius''': Sneak attack -- very good, Daniel. You're getting more like me with every battle.\\
'''Danny''': I am '''NOTHING''' like you!\\
'''Plasmius''': Oh, you're not? Using your powers to get back at people you don't like? Throwing the first punch? You're more like me than you know.
** Subverted in [[BadFuture "The Ultimate Enemy"]], because [[spoiler: the villain is, in fact, [[FutureMeScaresMe evil Danny from the future]], but he [[SelfFulfillingProphecy certainly makes it]] [[TheReasonYouSuckSpeech abundantly clear]] exactly how inevitable it is that Danny become him.]] [[ScrewDestiny It doesn't work]] [[ShutUpHannibal very well.]]
** Also in "Reality Trip" has it with Jazz and Freakshow:
-->'''Freakshow''': My parents loved ghosts more than me. My audience loves ghosts more than me. And deep down, I think I love ghosts more than me.
-->'''Jazz''': Tell me about it.
-->'''Both''': [[IJustWantToBeSpecial Sometimes I wish I was a ghost]]. ''(Looks at each other.)''
* The ''WesternAnimation/{{Daria}}'' MusicalEpisode has a song dedicated to how [[{{Workaholic}} Helen]] and her daughter [[TheFashionista Quinn]] use their respective obsessions to bolster their self-esteem.
* The Dark Lord Chuckles the Silly Piggy tries this against ''WesternAnimation/DaveTheBarbarian''. It ends up as a spoof of this trope.
-->'''Chuckles''': We aren't so different, you and I. We are but twin sides of the same coin.\\
'''Dave''': Uh, no we aren't.\\
'''Chuckles''': ... You're right! What was I thinking?
* Throughout most of the early points of ''WesternAnimation/TheDreamstone'' the lucid sugary sweet Noops were like night and day compared to the cynical goofy Urpneys, who feared the former as much as they righteously abhorred the latter. Throughout later episodes however, occasional lampshades were made at the fact that Rufus and Amberley were as much errand runners for the heroes as Frizz and Nug were for the villains. They even started to display a similar snarky disposition about what they are put through at times.
* Though they'd never admit it, ''WesternAnimation/EdEddNEddy'' arch-enemies Eddy and Kevin are probably the two characters who have the most similar personalities, the biggest difference being [[BigManOnCampus Kevin is popular]] and [[AllOfTheOtherReindeer Eddy isn't.]]
* In ''WesternAnimation/TheFairlyOddparents''Crocker. Timmy did Crocker's fairy spaz when he went back in time.
-->'''Timmy''': Fairy Godparents!!!\\
'''Cosmo''' and '''Wanda''': (smack and hit him)\\
'''Timmy''': Thanks for not using the oar.
** When Timmy met Remy, Remy asked for him to wish his fairies away. Timmy said "You know what stinks about you, Remy? You're rich, you got godparents and you're still miserable. I know, at least, that I'm happier than you, Remy." Later, he says:
--->'''Wanda''': What's wrong, Timmy?\\
'''Timmy''': (as a dragon) I felt sorry for Remy. I wish I could help him.\\
'''Wanda''': We can do that.\\
'''Timmy''': (as a dragon) I wish Remy could spend more time with his parents.
** Also, Norm the Genie did it really subtly in 'Genie Meanie Menie Moe':
--->'''Norm''': I hate being [[{{Jerkass}} out-jerked]].
** The NotSoDifferent is in the choice of words. He chose to say 'out-jerked' instead of outwitted or something like that, which meant he acknowledged both he and Timmy were {{jerkass}}es.
** Or perhaps he was talking about the Lawyer Timmy wished for.
** [[MyBelovedSmother Mama Cosma]] and [[OverprotectiveDad Big Daddy]] also have this the first time they appeared together. Both of them can't stand who their child happens to be married to and that they tried to separate them which it ended in failure for both of them. This sparked a relationship between them.
** A more positive variant occurs with Timmy and his Grandpa when they find out they both have the same taste in cartoons.
* ''WesternAnimation/FamilyGuy'': Stewie realizes he's not so different from one of his "potential siblings" when one of them mentions that he too hates Lois.
* ''WesternAnimation/{{Gargoyles}}'': When Angela is injured by the Hunters, Goliath goes on a psycho-vengeance rampage. Demona uses these exact words.
* In ''WesternAnimation/GeneratorRex'', the cyborg Gatlocke tries this line on Rex, while they're having a swordfight atop an out of control truck heading toward a cliff. Just before the truck reaches the edge, Rex retorts that there is a major difference between them: Gatlocke can't fly.
* On ''WesternAnimation/GoofTroop'', Pete and Max ''loathe'' each other most of the time, but they have more in common with each other than with anyone else on the show: they're both ambitious leaders who are self-centered and prone to using other people as means to an end, and they're both far better at coming up with ideas than thinking them through. They'd never admit it though, except in "O, R-V, I N-V U" where their similarities lead them to build such a strong bond that a WhyAreYouNotMySon situation arises with Pete's diametrically-opposed son as the reject.
* In one late-series episode of ''WesternAnimation/HeManAndTheMastersOfTheUniverse (2012)'', Skeletor's spider-like minion Webstor breaks into the Adreenid city and gorges himself on ambrosia. When Stratos and Buzz-Off investigate, they find the place totaled; when a survivor is able to tell them what happened, Stratos at first thinks Webstor won't be a threat for long. (Ambrosia makes people incredibly strong, but to anyone except an adreenid, it quickly turns toxic.) However, Buzz-Off ominously says that may not be true, saying that Webstor's species is "more closely related to my people than I care to admit". (And as it turns out, what it changes Webstor into is [[NightmareFuel pretty disturbing...]])
* In ''WesternAnimation/IronManArmoredAdventures'', Tony learns that he and the Comicbook/BlackPanther have much in common after [[Comicbook/WarMachine Rhodey]] points out that they're both young men who became vigilantes to avenge their murdered fathers.
* In an episode of ''WesternAnimation/JackieChanAdventures'', Valmont, who was possessed by Shendu, managed to stun the demon for a while, and tried going to Jackie's uncle's place for help. However, his former henchman Tohru was still ''very'' angry with him for what had happened that had led to Tohru's original HeelFaceTurn. (Valmont had ordered Tohru to fight Shendu, and Tohru had almost gotten killed as a result.) Valmont addressed this by saying, [[SarcasmMode "Oh, and I suppose that's]] ''[[SarcasmMode totally]]'' [[SarcasmMode different from what Chan has you doing?"]] (Still, Tohru rejected this argument quickly, saying that [[GoodFeelsGood he had gotten more respect and felt more satisfaction]] as Uncle's apprentice than he ever did working for Valmont.)
** On closer inspection, [[TerribleTrio Finn]], [[IneffectualSympatheticVillain Ratso]] and [[LaughablyEvil Chow]] have a lot of similarities with the title hero. As Jackie laments that he's been dragged to the front lines in the battle against separate Dark Forces, the Enforcers grow sick of being [[MookCarryover continuously force-conscripted as henchmen]] of said Dark Forces. Jackie is often yelled at, ordered around and slapped by [[AbusiveParent his uncle]], while the {{Arc Villain}}s are all {{Bad Boss}}es to the Enforcers. In a similar way to how [[IJustWantToBeNormal Jackie would love nothing more than get back his old non-magical life of archaeology]], the Enforcers eventually want to quit the entire magic business and go after what they really want: mundane riches. Plus, all four are the biggest {{Butt Monkey}}s of the series with some ManChild traits and a knack for surviving near-death experiences.
* ComicBook/LexLuthor in ''WesternAnimation/JusticeLeagueUnlimited'' proves himself a thorn in the League's side by constantly pointing out in the in-universe media how [[FalselyReformedVillain his apparent attempts at reformation]] are not so different from the more EasilyForgiven exploits of League members: After all... Superman had been brainwashed by Darkseid into leading war on Metropolis, and Hawkgirl betrayed the entire ''planet'' to the Thannagarians... [[PsychoticSmirk Why doesn't Lex deserve a second chance?]]
** In the finale of the second season of ''[[WesternAnimation/JusticeLeague Justice League Unlimited]]'', the heroes face AlternateUniverse {{evil twin}}s of themselves. Superman's evil twin taunts him as being NotSoDifferent from him: "Power corrupts, after all, and who has more power than Superman?" This is followed by Superman following the trope exactly by shouting: "I'm not like you! I'm nothing like you!"
* Kim and Shego of ''WesternAnimation/KimPossible'', especially after the events of "Stop Team Go." Both are powerful and clever young women who also have a taste for fashion and have a close relationship with a more bumbling male.
* The resolution to the first ''WesternAnimation/LennyAndSid'' video, "Love Thy Neighbor". Sid really wants to be Lenny's friend, but Lenny doesn't want it at first but at the end, Sid stands up for Lenny, which helps him realize that he and Sid can be friends despite their differences.
* In the first episode of ''WesternAnimation/TheLionGuard'', Kion learns that hyenas and lions have a lot in common when he befriends a hyena named Jasiri who puts to rest many of his misconceptions about them. There's even a song about it.
-->''Sisi ni sawa'' means we're the same.
* In ''WesternAnimation/MightyMax'', Norman confronts the semi-immortal that slaughtered his village centuries ago. Norman eventually defeats him and has him held over an effectively bottomless chasm when the villain triumphantly invokes this trope with the standard declaration of "[[IfYouKillHimYouWillBeJustLikeHim If you kill me, you'll be just like me!]]" Norman just looks at him for a moment, before calmly stating, "I can live with that" and dropping him. Aversion from the typical in that Norman never evinces a single bit of guilt over doing so, but then, he was never exactly the touchy-feely hero type in the first place.
* In ''WesternAnimation/MoralOrel'', Unhappily married Clay and Bloberta both had a loving relationship with one of their parents, but the other was much colder with them (mother and father, respectively for Clay; the opposite for Bloberta). We also find out during the former flashback that Clay was a lot like Orel when he was a kid and young man, and both were victims of abuse.
* Parodied in the first episode of ''WesternAnimation/PinkyAndTheBrain'' as a stand-alone series when the government agent responsible for tracking down the ROV Pinky and the Brain have stolen tells Brain this. [[SarcasticConfession Brain points out that he is a genetically engineered lab mouse bent on world domination.]]
* Rick of ''WesternAnimation/RickAndMorty'' gets accused of this... by an alternate universe version of himself.
-->'''Alternate Rick:''' We're not so different, you and I.\\
'''Rick:''' Yeah, duh!
* Sonic and Sally from ''WesternAnimation/SonicSatAm''. They may seem complete opposites at first glance, but they both are a bit arrogant, they are [[DeadpanSnarker Deadpan Snarkers]] at times, but in the end, they are willing do what they feel is best for their team.
* ''WesternAnimation/SouthPark'':
** After [[WordOfGod Matt and Trey]] turned Cartman and [[TheSmartGuy Kyle]] into [[SitcomArchNemesis Sitcom Arch Nemeses]], the two have been on-ends for season after season, mostly with Cartman doing something morally questionable and Kyle trying to stop him. However, in more recent episodes, it's shown that Kyle will go to extreme lengths that would be considered crossing the MoralEventHorizon [[KnightTemplar if he wasn't putting Cartman in danger to get rid of him]], from thieving him to ''murder attempts''.
** Cartman isn't the only person Kyle puts in danger. In the episode "Douche and Turd", he almost had ''[[WithFriendsLikeThese his own best friend]]'' killed by Puff Daddy [[ItsAllAboutMe so he can get Stan's vote for his candidate]] and then he got even madder at Stan for voting for Cartman's Candidate. "Fatbeard" had him feel willing to send Cartman's entire Pirate crew to their death in Somalia (which included classmates such as [[ButtMonkey Butters]] and Clyde). This proves that he can reach a Jerkass level, even after the earlier episodes. Worse is that [[DesignatedHero he's treated as the good guy no matter what]].
** [[LiteralMinded They even have the same blood type, AB-]].
** Both Stan and Kyle were far more callous and self serving in earlier episodes. They often joined Cartman in bullying or exploiting other kids such as [[ButtMonkey Butters and Pip]] and were [[LackOfEmpathy equally unempathetic]] to the abuse [[IronButtMonkey Kenny]] suffered. It is vaguely hinted it was their bullying of Cartman that embittered him into the ComedicSociopath he is today, much in a similar manner that [[HeWhoFightsMonsters Cartman is grating on Kyle's morals and standards as of recently]]. These aspects are less prominent in later episodes though are still evident at times.
*** In a later episode, Cartman pulls the NotSoDifferent speech on ''Cthulhu''. Think about that for a second....
** Parodied with the Goth kids in Season 7.
-->"You can't be a nonconformist if you don't drink coffee."
-->"If you want to be one of the nonconformists, all you have to do is dress just like us and listen to the same music we do."
* ''WesternAnimation/StevenUniverse'': The show has repeatedly shown that Pearl and Peridot are quite similar both from their designs (sharing the gem placement in the head) and their personalities (smart, controlling, insecure). "Back to the Barn" especially highlights their needs to prove themselves and has them go head to head. When she, Lapis, and Connie try to emulate the Crystal Gems Lapis points out that she should have been Pearl which causes Peridot to rant about how they're nothing alike all the while acting out the negative traits she accuses Pearl of having.
* Baloo and Rebecca from ''WesternAnimation/TaleSpin'', DependingOnTheWriter at least, while they have contrasting ethics and life preferences, [[SmallNameBigEgo their]] [[JerkWithAHeartOfGold manner]] [[GrumpyBear of handling]] [[GeniusDitz things]] are very similar. One could argue if not [[FishOutOfWater raised under a different environment and education]], Rebecca may have been something of a DistaffCounterpart for Baloo.
* ''WesternAnimation/TeenTitans'' likes this a lot.
** Slade is ''obsessively'' fond of doing this to Robin, because he wants to make Robin his apprentice. It always makes Robin go into a frenzy of rage, which is always fun for Slade, who just clearly enjoys messing with his head. This was the premise of the "Apprentice" episodes. Robin ponders near the end, "Focused, serious, determined...as much as I hate to admit it, he and I are kind of alike. But there's one big difference between me and Slade -- [[ThePowerOfFriendship He doesn't have any friends]]." Slade even manages to do this when he's ''dead'' in "Haunted" by making Robin act crazy and violent through drugs. He later taunts him by referring to them as "friends" when they team up in "The End". Slade is not all that different from Robin's mentor Batman, with the key difference there being that, while they are both cold and meticulous, Slade is cruel and self serving while Batman is selfless and compassionate behind his ruthless exterior.
** An even worse example occurs in "Masks". When Robin tries to justify to Starfire why he didn't tell trust them enough to tell them he was Red X, she sadly tells him that he does indeed have a big thing in common with Slade: Neither of them trust anyone.
** Trigon also does this to Raven, calling her "[[InTheBlood daddy's little girl]]," with the double whammy of BecauseDestinySaysSo.
** Brother Blood tries to do this to Cyborg, but it's not as effective as with Robin, because Cyborg is a lot more grounded and Blood isn't as good at making things personal. In fact, it's Brother Blood who takes this the most seriously, to the point that he [[spoiler:makes himself into a cyborg]] to prove his point. [[spoiler:The hero's response? [[YoureInsane "You look like a psychopath!"]] ]]
** In "Forces of Nature", Beast Boy realizes Thunder and Lightning are the same as him due to them playing pranks, thinking they're harmless, and never realizing they could cause real harm with it and getting their friendships ruined. Similar to how Beast Boy's friendship with Starfire almost got jeopardized by this, Thunder has a similar situation when he tried to stop Lightning from doing more destruction.
* In ''WesternAnimation/TheBatman'', villains try this on Batman with increasing frequency as the series goes on. To his credit (and the misfortune of said villains), Batman proves quite capable of rationally explaining the key differences while he beats the snot out of them.
** Then again, while it's rare for a hero to come to this conclusion about himself without ''any'' prompting at all from the villain, Batman did so in the episode "The Big Dummy". Alfred was trying to convince Bruce to expand his social life online, and he had actually met a woman named Becky who he promised to meet. As Batman, in the main storyline, he confronted Scarface, and when learning that Arnold Wesker and Scarface were clearly a case of a SplitPersonality, where Scarface was the dominant personality, he started to wonder if he and Bruce Wayne were similar. If Batman was ''his'' dominant personality, he wondered if he could have ''any'' true relationship, because Bruce was nothing more than a lie. (At the conclusion, he decided against it, telling Alfred to meet with Becky and apologize. Becky asked if Bruce was married, and Alfred told her he was - to his work.)
* In ''WesternAnimation/TotalDrama'', resident {{Alpha Bitch}}es Heather and Courtney gave very different first impressions at the start of the series (the former [[BitchAlert establishing her snobbiness from the start]] and the latter [[BitchInSheepsClothing acting nice early on]]); however, both have very dominating personalities, taking the leadership role within their respective teams in the first season. Their personalities especially clash in ''World Tour'', as both are on the same team. Also, both Heather and Courtney are despised by most, if not all, of their fellow castmates for their antagonistic and selfish ways.
** Courtney and Duncan are also this. She berates him frequently for being a selfish, unrepentant jerkass- but she's [[HypoCrite exactly the same way]], except that he's Chaotic and she's Lawful.
** This is the basis of Alejandro and Heather's rivalry, and the reason they team up; they're both vain, backstabbing assholes, but they have exactly the same motivation and mindset, making it easy for them to work together (although they mutually agree to betray their alliance once the other contestants have been voted off). They also share a mutual disdain of the other contestants, and gradually evolve into WorthyOpponent[=s.=]
*** In ''All-Stars'', this is likely why Alejandro [[spoiler:is quick to forgive Heather for her manipulation of him in the previous season.]] He wouldn't have done the same thing to ''her'', specifically- but he has to many other people, and understands perfectly why she did it to him.
** In the episode "Total Drama, Drama, Drama, Drama Island" Heather tries to team up with Lindsey and Beth [[spoiler:(both of whom she abused)]]; then tries to team up with Leshawna, Gwen, and Trent [[spoiler:(even though she kissed Gwen's boyfriend Trent to upset Gwen)]]. Harold tried to team up with Duncan and Courtney, [[spoiler:even though he rigged the vote so Courtney got kicked off the island]]. So both Heather and Harold try to join teams with people they're mistreated and end up teaming up because they're not able to team up with anyone else.
* In ''WesternAnimation/TransformersAnimated'' Prowl often dislikes [[KidAppealCharacter Bumblebee's]] childish and reckless antics. Yet Prowl was just like Bumblebee before becoming a cyber-ninja.
* A rare positive example is displayed in ''WesternAnimation/TransformersPrime''. Ratchet, who's known Optimus since before he became Optimus Prime, notes that the human Jack reminds him of how Optimus used to be when his name was Orion Pax.
* In ''WesternAnimation/TurtlesForever'' it's shown that the 2003 and 1987 worlds are very different from each other, but, as the 2003 Shredder says...
-->'''The Shredder''': Two turtle teams from two turtle worlds, different in so many ways...but deep down, there are similarities.
** Also, the Shredders. Even though the Utrom Shredder is the most dangerous Shredder presented, he comes out from the Technodrome and into the open when the Mirage Comic Turtles accuse him of cowardice, a ploy the 1987 Turtles pulled on their own Shredder. As 2003 Leonardo says...
-->'''Leonardo:''' If there's on constant in the universe, it's the Shredder's big, fat ego!
* ''WesternAnimation/TheVentureBrothers'':
** The Mighty Monarch deliberately invokes this trope, convincing the extremely naive Dean Venture that, if he reports the Monarch's actions, [[StrikeMeDownWithAllOfYourHatred telling will make Dean JUST LIKE HIM!]]
** Subverted in an episode of season 2 when Phantom Limb attempts a NotSoDifferent speech on Brock Samson, only to have him interrupt it.
-->'''Phantom Limb:''' We're not so different, you and I-
-->'''Brock Samson:''' Yeah, I don't need another "We're not so different" speech, I get those a lot.
** Dr. Girlfriend mentions this trope once, remarking that the Monarch and Dr. Venture have a lot in common. She ''does'' want this whole rivalry thing to stop; at least once, The Monarch (having been too obsessed with Venture to get a proper anniversary present) tries to pass off his normal bring-Venture-to-his-knees thing as the anniversary present (Dr. Girlfriend was appropriately incredulous at the notion that The Monarch accomplishing goals that were utterly meaningless to her made a good anniversary present).
** Further explored by Rusty and the Monarch themselves in episode ''The Devil's Grip'', where they compare how messed-up their lives are (Jonas Jr. and the Moppets are taking over Rusty's and the Monarch's lives respectively, the Monarch's wife [[spoiler:becoming a member of the Council of 13]], much to his chagrin, and Rusty's old archenemy being his bodyguard).
* ''WesternAnimation/WackyRaces'' has Dick Dastardly as the villain because of his [[DickDastardlyStopsToCheat cheating]], but, in this race, cheating is often the only way for any of the racers to win. Only four of the racers never cheat at all specifically: Peter Perfect, Penelope Pitstop, Lazy Luke and Sergeant Blast. Sure, Dick's schemes involve taking out the other racers, but the rest of them do the same thing (though to be fair the majority of the other racers' attempts are mostly harmless such as jumping a few places ahead or lifting another racer up and driving under them, while Dick Dastardly's plans are often potentially lethal) some of the other racers that are shown as villainous like him are the Ant Hill Mob, the Slug brothers and the Gruesome Twosome. Dastardly's one victory was reversed after finding out he extended his vehicle when crossing the finishing line. He is disqualified and booed vigorously, despite the fact other episodes featured another racer using the same tactic and winning legitimately, being the only example where he was treated unfairly. It should also be noted that, despite this double standard, many of the other racers attempts at dirty tactics (at least intentional ones) lead to slapstick backfires themselves.