I haven't played it, but they said it includes "next gen improvements" which I can only assume means improved visuals. I'm not sure what else that could be.
Anniversary edition on PC was basically a $20 dlc to get all of the creation club stuff. Maybe they reworked some stuff for the current gen consoles, but I still wouldn't consider that a remaster.
Like I said, I didn't play it. I'm just going off the description in some random article I found online. Whatever you want to call it, it's yet another "edition". They have far too many "editions" while the other games in the franchise have been ignored. That was my only point.