[wesk05]

So what would be your opinion and conclusion here regarding which has just dithering and which may have true 10bit?
Did you switched ON that "manual 10 bit" option in OSMC?

Vero 4K and LE-S905X are the good ones. The patterns that you see are due to rounding errors. CE-S905X is actually the worst. It is actually 8-bit with dithering. CE-S912 is 10-bit with dithering. If there wasn't dithering CE-S192 will also look like Vero 4K and LE.

Yes, 10-bit mode was enabled for Vero 4K.

Which version of CE was used?

8.95.0  release