The Xbox One version of Dying Light doesn't render at full 1080p or run as smoothly as the PS4 version, according to pixel-counting experts Digital Foundry.
While the site acknowledges that it's still trying to determine the exact resolution of the Xbox One version, its initial report suggests that the game runs at a native resolution of 1536x1080 "or something very close to it", leading to a "basic 20 per cent pixel drop in the overall pixel count" when compared with the PS4 version's native 1080p output.
The Xbox One version also "falters a bit when it comes to sustaining its target [30fps] frame-rate", the site says, running "tangibly worse than PS4, with specific areas of the city and certain sequences operating at a lower level of performance on the Microsoft console".
In comparison, the PS4 version is said to run at a "locked 30fps with very minor dips in certain circumstances".
Techland initially said that it hoped to deliver a 60fps frame rate on both PS4 and Xbox One - a target it stated was "absolutely doable", before rolling the game back to 30fps late last year.
The Xbox One version is said to have the advantage when it comes to anisotropic filtering, however, "with oblique angles producing much sharper texture work on Xbox One". The scenario can reportedly lead to the Xbox One version rendering a higher amount of texture detail in some scenes, despite running at a lower native resolution.
"Once you set foot outside the two games look very similar," the site adds.
Dying Light launched digitally on PS4 and PC today, with a release following this Friday on Xbox One.