The PC version looks better, of course. Slightly better textures and much better antialiasing. The missing soft engine and particle effects, don't hurt the PC one bit. PS4 and Xbone imho should also had their priorities on textures and antialiasing, to make the game look considerably better than thePS3/Xbox360 version. :/
Something, that is still inexplicable to me: Why do the PS3/Xbox360 and PC versions all have anisotropic filtering on floor textures, but only the PS4/Xbone versions don't? These washed out floor textures in the distance look like sh**.
Guess I should mention that by "worst performing stage" I mean sometimes it dips to 55 FPS on my rig, but I think in the corner of that map (Where Alpha is standing on the last pic, behind her and to her right) if the camera shows that area I get the biggest drops as low as 30 fps.