I tried both the PC and PS5 versions. Ended up sticking with PS5, got around 40 hours in it now.
The PC version is fine and performed "ok" - unlike Origins and Odyssey it doesn't seem like a cpu killer, it seems very gpu dependant this time around, although I've heard people say the game shits itself with lower RAM speed. Mine is 3200, paired with a 10700k and rtx 3070. At 1440p it was running at around 75-80 fps with near max settings IIRC. Was a good time.
but I dont really like buying non steam games, only tried the game using the ubisoft sub service. Bought it on PS5 and it runs fine. Its 60 fps most of the time, although there is definitely drops here and there. Some bizarre screen tearing in places too where it feels like it shouldn't be doing that. And micro freezes that last half a second here and there, usually 15-20 mins apart - apparently this is likely caused by the online services so it might affect other platforms too, dunno. Doesn't always happen though.
graphically i honestly couldn't tell the PC and PS5 versions apart. The PS5 foilage detail may still be higher but it's hardly something that you notice unless you have 2 instances of the game running. Ground detail pop in is pretty bad on both versions, although it's honestly mostly noticable in Norway... in England, you have a lot of foilage which side steps this issue imo.