Inventory takes like 30 seconds to load Plus imagine how hard it would be in pvp to be playing on he older console against players with the better console Lag in game would be 100 times worse And no matter what frame rate they both run at PS3 stutters a lot the ps4 is way smoother and more responsive Don't get me wrong I love playing on both my PS3 and ps4 but cross gen for this game would not work Especially since the PS3 doesn't have a party system