Digital Foundry has just put up the article, not just frame rate, http://www.eurogamer.net/articles/d...b-raider-definitive-edition-next-gen-face-off
To begin with, let's address the differences between the two versions of the Definitive Edition on offer. PlayStation 4 users get a comfortably delivered 1080p presentation backed up with a post-process FXAA solution that has minimal impact on texture quality, sporting decent coverage across the scene, bar some shimmer around more finely detailed objects. Meanwhile the situation is more interesting on the Xbox One: the anti-aliasing solution remains unchanged, but we see the inclusion of what looks like a variable resolution framebuffer in some scenes, while some cut-scenes are rendered at a locked 900p, explaining the additional blur in some of our Xbox One screenshots. Curiously, the drop in resolution doesn't seem to occur during gameplay - it's only reserved for select cinematics - suggesting that keeping performance consistent during these sequences was a priority for Xbox One developer United Front Games.
For the most part the main graphical bells and whistles are lavished equally across both consoles, although intriguingly there are a few areas that do see Xbox One cutbacks. As demonstrated in our head-to-head video below (and in our vast Tomb Raider comparison gallery), alpha-based effects in certain areas give the appearance of rendering at half resolution - though other examples do look much cleaner. We also see a lower-quality depth of field in cut-scenes, and reduced levels of anisotropic filtering on artwork during gameplay. Curiously, there are also a few lower-resolution textures in places on Xbox One, but this seems to be down to a bug (perhaps on level of detail transitions) as opposed to a conscious downgrade.
Frame-rate
Our early look at performance revealed a startling gap between the next-gen platforms, with PS4 commanding a massive frame-rate advantage, while Xbox One even managed to drop below the 30fps mark under load. For the most part, on the PS4 we see frame-rates regularly fluctuating between 40-50fps depending on the complexity of the scene, with exploration in highly detailed areas with lots of effects responsible for the drop in performance. On the flipside, the game manages to hit 60fps pretty solidly in locations that have fewer effects at work, and in the more scripted action sequences where the rendering load is more predictable.
But despite the inconsistency in the PS4 experience, we still feel it's the preferable buy. During combat - a key element in the game - we see the Xbox One drop down to the mid 20s, with the PS4's higher frame-rate offering a clear advantage in both smoothness and response, despite the fluctuations - the bottom line is that the differences between 40-50fps on the PS4 are far less of an issue than, say, the 24-30fps drops incurred by the Xbox One.
Verdict
Overall, PlayStation 4 takes the lead where the next-gen consoles are concerned, with the higher quality effects work and higher frame-rates providing a preferable experience overall, particularly during heated combat, where the drops in performance are both felt and seen more heavily on the Xbox One. That said, as we pointed out in the performance analysis earlier this week, we would have liked an optional 30fps cap in the display settings to eliminate the judder during the frame-rate fluctuations and keep absolute consistency with controller response throughout.