Oh man, I'm so screwing pissed at B&O after seeing these for how little effort they've put in the HX.
These (Beoplay Portal) come with bigger battery (1200mAh, the HX don't have 2.4GHz connection, so it definitely could have fit in them too), proper volume control buttons, microphone that works also when using the 3.5mm line-in cable and USB-C cable (HX don't), and most importantly, parametric EQ settings in the app (something we've been asking B&O since the H7 came out).
The ear cushions also look much more comfortable than the ones of the HX.
Seriously, they could have done much more with the XH.
I am quite disappointed.