The PlayStation 4 version of Metal Gear Solid V looks slightly better than the Xbox One version. This information was revealed in Game Informer’s extensive MGSV coverage for their March issue. To quote the article:
Kojima notes that MGSV looks slightly better on the PS4 compared to the Xbox One, something we also noticed before he mentioned it.
Unfortunately the writer didn’t elaborate on what exactly this entails. Either way, it’s good news for fans planning to get the game on PlayStation 4.
Source: Game Informer March 2014 Issue