Original story: Digital Foundry's The Callisto Protocol analysis is here, and sadly, there are a few issues present on both current-gen Xbox consoles right now. Sure, the game is absolutely playable on the pair of Xbox Series systems (the same can't be said for the PC version), but the Series X and Series S have a few drawbacks at launch in terms of both visuals and performance.
Over on Xbox Series X, ray traced reflections are mysteriously missing where they're present on PS5; within the game's quality mode. DF says that RT shadows are still active, but when it comes to reflections, they're just not working properly right now on Xbox.
"We have passed this information along to the development team, and hopefully this will be addressed soon via a patch but it's highly disappointing as the look of the game benefits so much from what is a high-end implementation of this RT feature."
The premium Xbox console also suffers from some frame rate drops in quality mode, although a patch has been issued that cleans things up quite a bit here. The analysis still shows the PS5 ahead frame rate-wise in this mode though, with the 60FPS performance mode offering up very similar results across Xbox Series X and PS5. In other words, if you're buying The Callisto Protocol on Xbox Series X, performance mode is definitely the way to go for now.