The real issue isn't specs but cost.
The Quest 2 is the single most widely used VR headset in the world with the Quest 3 and 3S right after it. While these are goo devices, it's telling that the Quest 2 - with noticeably lower resolution and performance - is the winner. That's because it's the cheapest of the options and people who bought one, if they're still using it, do not feel compelled to upgrade.
The Quest Pro was a flop not because of its specs, but because of its price. The upper limit for a consumer grade VR headset is around US$1000. That's not to say headsets over that price won't sell, the Apple Vision Pro has sold , although the highest estimate is maybe 300K units before returns, which we know were many compared to the 10 million Quests.
Unless the Galaxy XR starts below US$1000 and preferably below US$750, it will be much like the Apple Vision Pro - a niche product looking for a consumer, but without the Apple fandom behind it to bolster even the AVP's small success.