The Xbox One version of Trials Fusion will require a day-one patch to raise the game's resolution to 900p, Ubisoft has confirmed to Eurogamer.
Before that the game will run at 800p, albeit at 60fps.
The game's PlayStation 4 version will run at 1080p 60fps from launch.
Intriguingly, Eurogamer was told back in February that developer Redlynx was targeting 1080p for both PS4 and Xbox One, although the final specifications for each platform had yet to be locked down.
"For the new gen systems, the target is 1920x1080 but we are still optimising for those systems so we have nothing definitive on the resolutions yet," studio brand manager Jason Bates told us.
Digital Foundry is currently looking at all four versions of the game (Xbox 360 and PC, too) and will have the full verdict on how all of them match up very soon.