I haven't had the H95s for a while, so will go off memory here. The quality of the build is very comparable, with the PX8s possibly winning this due to the folding feature of the 95s adding an additional feeling of cautiousness when taking out and putting away. The volume is not as limited on the PX8s, which was somewhat of an irritant when I had the 95s. I want to control how loud the cans go, not the manufacturer telling me what is too loud
This was the primary reason I don't have them any longer. I think the mids are more pronounced on the PX8s as well, but again, going off memory. With B&W coming off their high horse and allowing for sound adjustments in the app (for S2s as well), albeit a basic eq, I think they have gotten rid of the irritant that a number of folks have had with their headphones. I have not felt the need to adjust these yet, but I do like that flexibility. The H95s, along with the other B&O headphones I have/had (EQ,EX), require adjustments in the "wheel" to get them to my liking. No knock whatsoever on the 95s as I really liked them, especially the ANC wheel on the earcup, which is awesome. Also, the case/combo is quite a bit lighter on the PX8s than the H95s with that metal case. Hope this helps some and apologies I can't get closer on comparing, but it's been a while since I had the H95s.