History FandomRivalry / RealLife

** Website/{{Facebook}} vs Website/TwitterX: Until Twitter raised its character limit from 140 characters to 280[[note]]although Unicode multibyte characters still use up 2 characters[[/note]], that character limit was what made Facebook users turn their noses up, on top of Twitter's reputation for being a source of celebrity gossip and opinions considered terrible, as well as the stereotype of Twitter users tweeting about every single moment, including [[TooMuchInformation when they're on the toilet]]. Twitter users in turn see Facebook as a wretched hive of [[GrumpyOldMan grumpy old folks]] and arguments in the comments of public posts and dislike the idea of having to use their legal name to maintain a Facebook account (''especially'' transgender users and other folks who are averse to using their legal names), which also means being obligated to add family members who have accounts there too.

** Website/{{Facebook}} vs Website/TwitterX: Until Twitter raised its character limit from 140 characters to 280[[note]]although Unicode multibyte characters still use up 2 characters[[/note]], that character limit was what made Facebook users turn their noses up, on top of Twitter's reputation for being a source of celebrity gossip and opinions considered terrible, as well as the stereotype of Twitter users tweeting about every single moment, including [[TooMuchInformation when they're on the toilet]]. Twitter users in turn see Facebook as a wretched hive of [[GrumpyOldMan grumpy old folks]] and arguments in the comments of public posts and dislike the idea of having to use their legal name to maintain a Facebook account, which also means being obligated to add family members who have accounts there too.

** Website/{{Facebook}} vs Website/TwitterX: Until Twitter raised its character limit from 140 characters to 280[[note]]although Unicode multibyte characters still use up 2 characters[[/note]], that character limit was what made Facebook users turn their noses up, on top of Twitter's reputation for being a source of celebrity gossip and opinions considered terrible and Twitter users using the website to air out dirty laundry. Twitter users in turn see Facebook as a wretched hive of [[GrumpyOldMan grumpy old folks]] and dislike the idea of having to use their legal name to maintain a Facebook account, which also means being obligated to add family members who have accounts there too.

** Twitter vs Mastodon: Mastodon was developed as an alternative to Twitter that is both open-source and also isn't a singular website but rather a federation of independently-operated servers that use the same protocol. Naturally, this means a lot of its userbase refer to Twitter as "hellsite" or [[MaliciousMisnaming "Shitter"]] and want nothing to do with it or anyone who continues to use it. Twitter users in kind find Mastodon to be too confusing to use due to its decentralized nature, and those who put in the effort to establish an account there find themselves disgusted by what they perceive to be technological elitism from the Mastodon community.

* In UsefulNotes/{{Montreal}}, two bagel shops, of all things, have a rivalry going on: St-Viateur and Fairmount. Although it's generally agreed that they're the top two places for bagels in Montreal, the debate over which one deserves the top spot is quite heated, with supporters being fiercely loyal to one or the other.

* iPhone vs. Android. iPhone users are stereotyped by Android users as being pretentious rich folks who only buy iPhones because of the Apple brand, while Android users are dissed by iPhone users are being too poor to get "good" phones. The arguments over preferred phones is often very reminiscent of UsefulNotes/ConsoleWars. Of course, it's generally a VocalMinority who are really defensive about their phone preferences; the SilentMajority tend to just quietly pick one over the other and not try to break friendships or cause flamewars over their choices.

* iPhone vs. Android. iPhone users are stereotyped by Android users as being pretentious rich folks who only buy iPhones because of the Apple brand, while Android users are dissed by iPhone users are being too poor to get "good" phones. The arguments over preferred phones is often very reminiscent of UsefulNotes/ConsoleWars.

* Dominoes vs. Pizza Hut.

** Said restaurant rivalry does not apply in the UsefulNotes/{{Philippines}}, where the local restaurant chain Jollibee hold the reins all over the country, and UsefulNotes/McDonalds comes in second place. Burger King and Wendy's are somewhat obscure outside of major urban areas.

* UsefulNotes/BritishEnglish fans vs. UsefulNotes/AmericanEnglish fans, bafflingly enough. British English fans argue that the Brits has their original English, American English sounds less classy and unnecessarily removed letters from words (think: 'colour' vs. 'color'), while American English fans argue that this is the version of English most are exposed to, has made letters match more closely to how they were pronounced ('plough' vs. 'plow') and that it didn't sound as foreign as British English does.

* UsefulNotes/BritishEnglish fans vs. UsefulNotes/AmericanEnglish fans, bafflingly enough. Britiah English fans argue that the Brits has their original English, American English sounds less classy and unnecessarily removed letters from words (think: 'colour' vs. 'color'), while American English fans argue that this is the version of English most are exposed to, has made letters match more closely to how they were pronounced ('plough' vs. 'plow') and that it didn't sound as foreign as British English does.

* UsefulNotes/BritishEnglish fans vs. UsefulNotes/AmericanEnglish fans, bafflingly enough. Britiah English fans argue that the Brits has their original English, American English sounds less classy and unnecessarily removed letters from words (think: 'colour' vs. 'color'), while American English fans argue that this is the version of English most sre exposed to, has made letters match more closely to how they were pronounced ('plough l' vs. 'plow') and that it didn't sound as foreign as British English does.

* UsefulNotes/BritishEnglish fans vs UsefulNotes/AmericanEnglish fans, bafflingly enough.

** Similar to the bus issue, some railfans (or people who just prefer traveling by train) will hate airlines because they think flying is a bigger hassle than rail travel or because in the second half of the 20th century the rising popularity of airlines resulted in a major downfall for passenger rail service.

* UsefulNotes/BritishEnglish fans vs UsefulNotes/AmericanEnglish fans, bafflingly enough.

* Related to various parts of the the above, Darwinian evolutionists (including theistic evolutionists) vs creationists. Intelligent design is somewhere in the middle, accepting macroevolution but with a religious overtone.

* UsefulNotes/BritishEnglish fans vs UsefulNotes/AmericanEnglish fans, baffilngly enough.

** Dinosaur lips. Seriously. Especially in meat eating dinosaurs. Debates can get quite heated over whether they had lip like tissue on the mouth or not.

** In America and especially Japan, KFC VS [=McDonald's=]. To the point that various remixes of Japanese Ronald McDonald commercials [[https://www.youtube.com/watch?v=XXU68uo9qUc&t=573s would frequently show Colonel Sanders]] (mascot and founder of KFC) [[TakeThat as an easy target for Ronald.]] Helps that both [=McDonald's=] and KFC are [[GermansLoveDavidHasselhoff insanely popular in Japan.]]

* Although mainly because of political reasons (and not on the internet, but rather an actual rivalry, with fighting), traditional Oi! skinheads and antifascist punks vs neo-nazi boneheads (who call themselves skinheads)
* The countless interreligious and intra-religion feuds.
* W.E.B. [=DuBois=] followers vs Booker T. Washington supporters. Both were early civil rights leaders, but could hardly be more different in their ideas. Washington urged black Americans to learn a trade and become part of the working class, where their buying power would naturally bring them into acceptance within white society. [=DuBois=] urged black Americans to study literature and the arts, embrace their cultural roots, and demand equal rights through fierce political action. Washington and his followers argued that [=DuBois=]'s strategy was too unrealistic and abstract, while [=DuBois=] and his followers accused Washington of perpetuating the blacks' low social status.

* Franchise/{{LEGO}} fans vs. Mega-Bloks and to an extent, Kre-O and, to a lesser extent, LEGO fans vs. all other building block toys. Not sure how strong this is on the non-Lego side, but on at least one Lego fansite, the names of other brands like Mega-Bloks and Tyco are used as replacement swearwords.

* X political party and Y political party, ''anywhere''. It's particularly pronounced in the U.S. with the two-party system.
** America actually has more than two parties but you probably wouldn't know that since only the Democrats and Republicans (aka the GOP) get any attention. This leads to the always-painful liberal vs. conservatives.
** And within the GOP, moderates vs. Tea Partiers, with the latter more recently being superseded by the alt-right. It's gotten to the point that [[DefeatMeansFriendship unity events]] are being canceled. And of course the Tea Partiers and alt-right are just going to fire up the Democrats.
** And within the Democrats, it's moderates vs. progressives. The 2016 primary between UsefulNotes/HillaryClinton and UsefulNotes/BernieSanders was a showdown between the two. The two groups continue to snipe at each other, with each side blaming the other for Clinton's [[UsefulNotes/DonaldTrump loss in the general election]].
** In America, the rivalry may exist more due to problems of in-group/out-group identification than actual differences, making this a sad case of manufactured rivalry.[[note]] There are two views of party composition: either bipolar (two huge blocs at each side of the spectrum and a small number of independents/undecided/apathetic) or unipolar (traditional bell-curve: the majority of people fall somewhere in the middle, and as you move toward the extremes of either side, numbers drop off). Each view favors different strategies -- if you believe the bipolar model, you antagonize your base by driving them to the polls for state issues (this was Karl Rove's strategy in 2004 when many states voted on gay marriage); if you believe the unipolar model, you build a platform around appealing to as many people as possible and avoid extreme stances. The problem (and rivalry) can be partly explained by the fact that the most extreme voices are often the loudest and election math: not every district is hospitable to moderation, nor is every state. What helps a candidate win a Senate seat in California may backfire spectacularly in Ohio. House races are even worse due to gerrymandering. State races are also tricky, as "conservative" and "liberal" vary by location, and sometimes state officers (particularly governors) are put in a position where throwing the national candidate from their party under the bus is the better move. This is one reason candidates have an incentive to favor rhetoric over actual policy proposals. Third-party candidates often criticize Democrat-Republican races as a choice between the same thing in different packaging.[[/note]]

* Kids vs. [[ChildrenAreAWaste no kids]]. Some parents think it's their job to convince childless by choice people that [[BabiesMakeEverythingBetter they'll change their minds if they have kids or are around them]], while conversely, too many childfree people think it's okay to mock and belittle those who do choose to have kids, to the point some more extreme types are full-on {{Child Hater}}s.

** In America and especially Japan, KFC VS [=McDonald's=]. To the point that various [[StupidStatementDanceMix remixes of Japanese Ronald McDonald commercials]] [[https://www.youtube.com/watch?v=XXU68uo9qUc&t=573s would frequently show Colonel Sanders]] (mascot and founder of KFC) [[TakeThat as an easy target for Ronald.]] Helps that both [=McDonald's=] and KFC are [[GermansLoveDavidHasselhoff insanely popular in Japan.]]

** There is also a (friendly) fandom rivalry between Rickenbacker and Vox, which was rather hot in the 60's and 70's. Rickenbacker fans say Vox's are just plain ''weird'' and are a guitar designed for the benefit of the amp, rather than the other way round (Vox were more famous for their amps than their guitars). Vox fans say Rickenbacker's are an ''absolute pain'' to keep in tune, and the famous "Rickenbacker Jangle" is just a symptom of them being an inefficent line of guitars.

** In the dinosaur fanboy community, one of the biggest debates involves who would win in a fight between ''[[KingOfTheDinosaurs Tyrannosaurus]]'' and ''[[AlwaysABiggerFish Spinosaurus]]'' (two of the largest carnivorous dinosaurs), with both sides involving fanboys who constantly think of reasons that their theropod is bigger or stronger while bashing the other. The feud probably started because the ''Spinosaurus'' replaced the ''T. rex'' in ''Film/JurassicParkIII''. Things get worse when the Carcharodontosaurus ''[[TakeAThirdOption Giganotosaurus]]'' gets involved, with fanboys practically doing the same thing as the other two carnivores. In fact, it would probably extend to a battle of ''any'' of the largest carnivorous dinosaurs.

** Then there's the battle of the largest marine predators, giant shark ''Carcharodon megalodon'' and the pliosaur ''Liopleurodon'' (even though the latter wasn't even that big, about 7 meters long because ''Franchise/WalkingWithDinosaurs'' based the 25-meter long depiction off incredibly fragmentary remains).

** UsefulNotes/BritishEnglish fans vs UsefulNotes/AmericanEnglish fans, baffilngly enough.

* Norwegian fashion models Juliane Snekkestad and Synnøve Ardal have a heavy rivalry, with both fandoms disliking the other one. Juliane fans often think Synnøve is too much [[TheGenericGuy too ordinary and generic-looking blonde girl]], while Synnøve Ardal fans tend to see the Juliane Snekkestad fandom as AlphaBitch-types who mock them for liking someone who is a more conventional GirlyGirl supermodel, especially in light of Juliane saying "I am a boy in a female model's body" which implies she is either a {{Tomboy}} or less likely, [[UsefulNotes/{{Transgender}} a trans man]]. [[GermansLoveDavidHasselhoff This applies in the United Kingdom where they are more popular than their home country of Norway]].

* "Normal" pets like dogs and fish vs [[CoolPet more obscure ones]] like rats, ferrets, or iguanas.

** Then there's the battle of the largest marine predators, giant shark ''Carcharodon megalodon'' and the pliosaur ''Liopleurodon'' (even though the latter wasn't even that big, about 7 meters long because ''Franchise/WalkingWithDinosaurs'' [[CriticalResearchFailure based the 25-meter long depiction off incredibly fragmentary remains]]).