I've played PC (maximum settings), PS3 and PS4 versions.

Graphically, I see almost no difference between the PC and PS4 versions. In fact, some things are done better on the PS4 (ambient occlusion, for example). Also, the surround sound effect is much more immersive in the PS4 version, and sounds in general sound clearer to me on the PS4.

The load times between areas are longer on the PS4 (not as bad as the PS3, though). I attribute this more to my PC using a SSD. I plan on upgrading the drive in my PS4 to SSD, so this may take care of that. I also notice a bit more loss of framerate in populated areas on the PS4 compared to my PC, but it isn't much. I don't recall ever seeing the framerate on the PS4 drop below 24 fps or so.

My only real gripes about the PS4 version was the touchpad isn't all that responsive, but that isn't used much so it isn't a big deal. The beta's active help windows didn't make it apparent that the touchpad is actually three buttons in one, so that was a couple minutes of confusion when I tried to cycle through UI elements the first time. Remote play on the Vita is cool, but I feel like the game needs a modified UI for remote play, and I don't see that happening any time soon if ever.

Non-game related, but I hate Facebook, and I hate hate hate that your only options for sharing screenshots on PSN is through Facebook or Twitter. PSN needs Google+ and YouTube support!