I have used some HMDs including a CV1, a Quest, a Vive, three 5K+, and an 8K+.
However none of them had clear panels but clear MURA on bright scenes regardless of LCD or OLED displays. It was not something like mist caused by my sweat. I can clearly see it on the panels.
I hope my 8KX will not have MURA but since 8KX use same panels with 8K+ I am pretty worried about it.