It's a fact there's a bigger technical difference between the consoles this gen compared to last. As for the visual difference I think it's night and day, resolution is easy for me to pick up on, frame rate, missing textures, having last gen effects in a game like Metal Gear Ground Zeroes (if you want to get specific) on XB1 and the only current gen version being on PS4, that actually runs at over twice the resolution, while maintaining 60FPS.
We're only just coming to the end of the 1st year, the sales incentive is there now for developers to start building their games to push PS4 more, which is now doubt what will happen in most cases.
So far the gap looks bigger, both visually IMO and technically in fact.








