Well it seems the PS4 has problems running Call of Duty: Ghosts in native 1080p because framerate suffers compared to the Xbox One version. That's where I assume the tradeoff is coming from.
Both IGN and Polygon updated their reviews of the game to note Ghosts consistently held at 60 frames per second, where the PS4 suffered noticeable framerate drops in multiplayer, as had been earlier mentioned by these publications and others.
"The Xbox One release's framerate was far more noticeable," wrote Polygon. "As mentioned in the initial review, Call of Duty: Ghosts suffers from consistent framerate drops on the PS4, especially during multiplayer when action got especially hectic. The Xbox One version suffered no such drops, maintaining a steady 60 frames per second throughout."1
IGN's reviewer said he dealt with "occasional framerate issues during the single-player campaign on PS3 and PS4, whereas my time with the Xbox One version was stable throughout."
http://kotaku.com/xbox-one-call-of-duty-offers-better-framerate-than-ps4-1463163114