- pixels of the 1/2.3" sensor are simply too small for real 4k resolution. If you do a proper resolution test on the 4k material from these sensors with down-to-earth lenses, you will see, that they rarely resolve more than fullHD.
The 4K samples I've downloaded from an M2Z seem pretty darn good to me, better than MP, likely due to the higher SD write speed. The main downside I see in M2Z is the low light capability, as compared to M2P of course. But M2Z does appear better than MP for low light.... for some reason. It could be better optics, but I'm not sure. Could be the sample was graded, even though the OP in the YouTube said it wasn't graded.