It looks like the colors might be a little more vibrant but I think it's just because all but one of the screenshots are night games. The Gronkowski shot still has that washed out look to it. Gronk's numbers are still gigantic on the front. Equipment is still a really bad joke from 2011, still waiting on those M12 team color cleats...
Overall not very different at all from M15. I wasn't expecting much in terms of a graphics upgrade but I would have at least liked to see more equipment added or, in some cases, fixed.