I just spent an hour going back and forth on a downloaded 720p video of BOTH versions of the game. Specifically, PS3 and Xbox One versions. I was comparing them directly, watch a scene on one then watch the scene on the other. Watch a fight on one and then watch on the other. Couldn't be a better comparison unless I edited them together.
And you know what? I think the last gen version is about 25% worse looking, maybe 30% if I'm being harsh. The main differences were blurrier characters models (expected of course) and flashy effects were less flashy (the breach is certainly less cool and impressive on the last gen versions) And the framerate looked the same. Now these were both from Youtube, meaning no higher than 30 FPS. Still, I didn't notice any framerate differences at all. And the PS3 version didn't show any lag or stuttering that the next gen version didn't show in its own version. So this "sub 30 FPS" that a certain ignorant person in here was spouting was false.
So the next gen elitists are full of crap. I looked as unbiasedly as a person can look, compared and contrasted, and I can promise you the difference isn't as gigantic as people are acting. Again, it's 30% if I'm being generous to next gen and 25% if I'm not. And any talk about the framerate being worse is not true. Even if the next gen versions have a higher framerate, the last gen versions definitely aren't sub-30.