Honestly, I don't know... I bought it on PC, but I already had everything I needed etc. to run it properly. I also have an Xbox controller for the PC too. I'm not sure I would want to play mouse & keyboard on my couch... For big open world games, I like to play on PC because there is technically way more versatility, i.e. beauty mods and so on. If you don't want the hassle and you want to play the game on your TV, just get it for console; if the game is any good, a few hours in you prolly won't notice whatever graphical pluses or minuses go with either version.
Graphically, I really have no idea if you will see any improvements or not running on PC versus console given your video card.