I tested the Master 200Mbps CBR two sample videos (AV1 and HEVC) using Pimax Crystal Light, and yes, I can assure, The AV1 is higher in quality (a little bit sharper) at "almost" the same bitrate which is around 122 Mbps for both sample videos.
But I barely can catch the difference using Quest 3. I mean I can almost see that the AV1 is better and I was afraid it's just a placebo effect after using the Crystal Light. So I switched between the two many many times and finally I can see the difference in quality in favor of AV1, but it's barely noticeable as I said.
And. Yes, the Colors are slightly better in the AV1 sample. But that can easily be achieved in the HEVC sample using better color grading. So, I didn't this affect my judgment between the two samples (I was looking for the "better/ sharper pixel" NOT the "best colored one").
Couldn't locate if both videos are in Constant Bit Rate (CBR). But they are definitely NOT in 200 Mbps but in "around" 122 Mbps as I mentioned previously.
Here is the full MediaInfo data for both videos for anyone interested:

My question is, did you guys do that on purpose because they are just "Sample" videos and the 200 Mbps CBR will be used in the upcoming (Master/ Original/ High Bitrate) videos?
Please tell me if I missed or misunderstood something and many thanks in advance.
Respectfully.