Battlefield 4 embargo ended a few hours ago for both Next Gen and Current Gen consoles. The most most telling thing to come out of this is a new comparison video that was released by Digital Foundry. The video puts both next gen versions up against each other and shows quite clearly how each version has it over the other.
The game seems to be running at a higher resolution on PS4 yet the textures don’t seem to be as clear. The differences seem fairly minimal to our eyes.