CB vs native, same as Sekiro, and most of other midgen enhanced games. There is no any platform prioritization, both work like expected from them.
XBO X in Elder Ring is running at a lower average resolution and worse framerate than Sekiro did compared to the Pro version.
Not to mention the unfortunate situation when it comes to loading times that is significant about which platform has been given extra attention. Not to mention the XBO version disaster...
Not seeing that PS plataforms goes one step ahead in optimization (at least in this beta network) is wanting to deny the evidence.
MS should send their commando and help them optimize, especially when they have some marketing deal. Because if I am not wrong, they show the first trailer and so on...
The first teaser trailer was presented at an Xbox event, but from there it has been to cross-platform events and Playstation events.
In fact, in the marketing of the game, the PS5 / 4 box is usually in front.
Of course it is not the typical game where it is clear which is the base marketing platform.