I was going through anime on this site ranked via ratings and some how:

Kuroneko to Majo no Kyoushitsu- the show where that girl kisses a cats bbooty; sits at 8.65
Barbarians wife- a show where a lady knight gets kidnapped and forced into marriage; is at 8.97

have higher ratings than 99% of the shows on this site, not an exaggeration.
These are very very mid shows, so I went to MAL and both sit below a 7 there.

However big shows like bleach, or RZ are much closer to their MAL rating but are not quite exact. Like off by .01%, meaning there is a ratings drift between here and MAL.

One is entire KOTO side ratings and the other is MAL submission only starting to be effected bay KOTO ratings.

The problem is that this does not tell me what the actual highest rated anime on koto are now. The highest rated stuff is mostly mid tier slop and promotional BS. Also I cant rely on in site ratings for what MAL rates it at a glance anymore.