I agree, even though i have radar vision !!!TBH I'm still to even realise if I can notice any difference in the image by chosing any of the YCbCr settings, and when/if I do I am trying to convince myself it is not pshycological. I asked someone else's opinion, while hidding the setting, and the answers are also dissonant.
Minix U22 display settings and how they are supposed to be set are all a bit of a mystery, I guess they are mainly just what comes with stock android 9 ?The one thing I noticed about 4.4.4 is that, once I select it, "Color Depth Settings" gets automaticaly turned off, which doesn't happen with the other two lower settings. But it sticks, so this might be another issue in which each individual hardware setup determines different results.