Planes and identical in both versions. Neither version has more or less functions than the other. They’re identical in every way.
As was mentioned, it’s likely you’re comparing the 3rd party FlyByWire A320NX to the default A320. There are huge differences between those two. That’s the nature of 3rd party add ons. Unfortunately, that’s one you don’t have access to on Xbox because it’s not in the marketplace.