You've got fans of the classic games, you've got fans of Angel of Darkness (most of whom are also classic fans but there are classic fans who don't like AoD, and there are fans who think AoD is the best game in the series and pretty much everything in between), then within that you've obviously got some smaller divisions of people who preferred the first three games or people who liked 4 and 5 better, etc. Then there are LAU (Legend, Anniversary, Underworld) fans - again, some of whom are also classic fans, some of whom aren't, some of whom have never played the classics - and reboot fans. Of course, not all LAU fans like the reboot (and many classic fans don't), whereas many reboot fans don't like any of the previous games, including LAU (or have never played them).
Obviously, TR has also had films, comics, novels, etc. based on it but I think most people who are fans of those tend to also be fans of at least some of the games so it's indeed not quite as bad as the Sonic situation in that regard. However, there is the new film reboot coming up and there are people who're already complaining that they preferred the previous films' direction or that they don't like Alicia Vikander playing Lara and liked AJ better and so on (vs people who're excited for the new film and think Alicia is a great choice).
On top of all this, there are pretty big disagreements across the different parts of the fandom regarding what Tomb Raider actually is, who Lara Croft actually is and so on.
Some people think Lara is totally irrelevant and that the series could work just as well without her (not from a commercial standpoint, obviously), for others, Lara is one of the main reasons to play the games.
Some people think the game mechanics are the most important aspect of the formula, others think it's the treasure hunting atmosphere, ancient environments and exotic locales. Some people think Lara is a borderline psychopathic antihero, others think she's a charming heroine who always saves the day. And so on and so forth. The Tomb Raider community is pretty awesome but yeah, it's fragmented as fuck. Maybe not quite as much as the Sonic fandom but still
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