FYI, this is the website I write for, and this is my article. Did some digging, got confirmation, here it is.
Source = Rocket Chainsaw
Verified sources close to Rocket Chainsaw have detailed performance and rendering quality of both the Xbox One and PlayStation builds of Tomb Raider: Definitive Edition. And for that we’re thankful. So here it is!
PlayStation 4 = 60 fps
Xbox One = 30 fps
Yes, the PlayStation 4 build is, on average, twice the framerate of the Xbox One build. Both builds are rendering at native 1080p resolution, and generally look the same in graphical effects (though some minor differences may apply). Performance is a different matter. Both feature unlocked framerates, meaning framerate fluctuates between higher and lower values. The Xbox One build can technically reach around 45 fps, though this performance is generally only achieved during the most empty, simplest environments. For most of your play, and during action scenes, the Xbox One build will sit on around 30 fps. On the other hand, the PlayStation 4 build will attempt to hit 60 fps as often as possible, and does a pretty good job of doing so, but does have slight dips under 60 fps during certain scenarios.
So there it is. Both 1080p. PlayStation 4 = ~60fps average. Xbox One = ~30fps average. Take with a grain of salt if you’d like, but we’ve confirmed it on our end, and confirmation for the rest of the world is only a week away.
Source = Rocket Chainsaw
AMENDMENT (24/01): There appears to be a little bit of confusion of the framerates reported, and the fault is our own and our poor wording. We inaccurately used the term “average” when the math, in reality, does not add up. Logistically saying the average is ~30fps implies it exceeds and dips below 30fps, averaging at the number. That is not the case. What our sources have reported is that the listed FPS are roughly the most common targets during performance. So while the Xbox One version can reach ~45fps, for a majority of play it will sit around the ~30fps market, give a few frames. Same goes for the PlayStation 4 build, which in most cases hits around 60fps, take a few frames. Our sources have not confirmed exactly, but our own extrapolation of the information suggests you might say the average (accurate use of the term) Xbox One performance could be ~35fps, meanwhile the average PlayStation 4 performance may be ~55fps. Actual, concrete performance benchmarks will need to wait until the game is out for everyone, as we certainly don’t have them.
We apologise for any confusion from misuse of the term “average”, and hope this amendment better clarifies performance on both systems.
UPDATE #1 said:Executive Producer Scot Amos confirms on GamesRadar LIVE Q&A:
[time stamp 50:35] http://www.twitch.tv/gamesradar/b/497373767
Q: Soooo, ah FPS?
A: So looking here this is the PS4 version running at 60FPS. So again, at 1080P. That's awesome for us to be able to showcase, because when you get your hands on it.... You feel it for sure. And when you're looking at it, you're like, yeah, thats badass.
UPDATE #2 said:IGN talks to A Square Enix spokesperson:
"Both platforms offer the same outstanding Tomb Raider experience. Delivering the core Tomb Raider gameplay at native 1080p and running at 30fps was always our primary goal given the type of experience Tomb Raider is and the exploration we want players to do. Anything beyond 30fps for this version is gravy."