The Xbox One X version will be the only one to support HDR and will have better graphical quality than PS4 Pro version.
With the large number of games that are being enhanced for the Xbox One X, you may have missed out on the information that Mafia III is also one of the games getting enhanced. The game will receive a number of visual upgrades such as HDR support and 4K resolution.
Andy Wilson, Executive Producer at Hangar 13 spoke to WCCFtech about the upgrades to the Xbox One X version of the game. The game will render at a resolution of 3072×1728 which is then upscaled to 3840×2160. The game will not be using checkerboarding to achieve this. Additionally, the Xbox One X version of the game will be the only one to feature HDR support. It remains to be seen whether the PS4 Pro or PC version will also get HDR support sometime in the future.
The game will also feature a number of other visual enhancements to the game that are not present in the PS4 Pro version of the game. Speaking of these differences, Andy Wilson stated, “The two main differences with the Xbox One X version are a higher overall resolution and the addition of HDR. On top of this we have also improved graphical quality for various rendering features, including SSAO, Geometry Detail, Shadows and Volumetric Effects. We released a PS4 Pro patch for launch last year and continued to improve the game over the course of 2017, so the Pro version represents a big upgrade over the original at launch. For the release of the Xbox One X we wanted to revisit the game one last time and try to push the metal as hard as possible, something I think we’ve achieved pretty well!”
As of now then, the Xbox One X version of the game seems to be the definitive way to play the game.