boudaba where did you take a screenshot from?
next time please make a a snapshot from some editing software or video player with timecode in format 00:00:00:00 (hours/minutes/seconds/frames)
consider the difference in left/right eye images and if you take a screenshot from one eye make sure to let me know which eye.
and attach a full screen snapshot along with the cropped zoomed version
took me some time but i think i found this frame
on my side its 01:01:22:30 right eye.

As i understand what we are discussing here is mainly the quality of the max 8k streaming file which is right now available for download, and not the master file.
i will repeat again just in case
Manny_S Streaming and all the possible resolutions. (that one goes after post production and we dont influence this)
Hopefully some conclusions will be made after this sort of comparison and the team will rethink server transcoding approach.
Now the only thing i can prove here is that the quality of the master files our post-production team produces is on the appropriate, acceptable, watchable level. With preserved as much as possible and enhanced details compared to the RAW footage.
Here is the side by side comparison of the RAW vs Master vs Max8K + your screenshot

a full body side by side

And finally even a 2 minute cut of each video, except for the raw (no re-encoding, pure ffmpeg copy stream)
HEVC master
AV1 master
MAX 8K (downloaded from SLR)