I don't know which of the two is worse in terms of what they do with the data once they have it, but one big difference is that Tiktok is much easier to avoid t

I don't know which of the two is worse in terms of what they do with the data once they have it, but one big difference is that Tiktok is much easier to avoid than google. I just don't use Tiktok anyways. For google, it's not that easy: The thing is: Google is not just Google the search engine, but also a huge zoo of other sites and services used not directly by you but indirectly via a big part of internet sites out there, often in a way that is required for the site to work. In other words: even if you don't use Google yourself, you still have to worry about their tracking and fingerprinting because of stuff that third-party sites use/embed from them. For example: youtube, recaptcha, analytics, web fonts hosting, embedded site search functionalities, google storage, googleapi, and other javascript apis (not all of which being easily recognizeable as belonging to google) etc etc. there are too many to list. In other words: they have their tracking embedded pretty much everywhere in third party sites. Some of that is easily blockable e.g. with ublock origin and uMatrix… other stuff not so much, and it's a constant game of whack-a-mole: they constantly acquire new companies providing services or APIs popular among web sites, so as to use that to better track you