I’ll know soon enough but can just give a general comparison between the two? The biggest worry I have is about bass slam. That was sort of the turn off for the Stealth based on reading reviews. It seemed like if didn’t have a great seal, people had issues with the bass. I’d imagine with the Expanse, you don’t have to worry about the seal. And Dan mentioned that he was able to give more energy to that area because of the open design.
The Focal Utopia can also have issues with bass on the wrong system and fortunately the Naim HE has the best bass and slam out of the setups I’ve tried, which was Hugo 2, Chord Dave, and Focal Arche.