Read it again, you are good at misinterpreting
And Mikael take it easy. Carm and fine
Just to be clear about what I am referring to:
I rather take 75Mp and it will allways be better compared to 21 Mp whatever lens you use.
Not too many way to interpret that. You explicitly said you would "rather take 75mp" (and I can only assume, given the context, that by that you mean "take the V1") and that "it will always be better compared to 21mp" (and by that I can only assume, given the context, you mean better than the 5D III), and you even qualified that with "whatever lens you use".
Sorry, that is plain and simply incorrect. If you throw a 250mm lens on the 5D III, to normalize angle of view with the V1 using an 85mm lens...and by "normalize angle of view" I mean produce the same exact scene and framing in the output image, the 5D III WILL
outperform the V1. The images will effectively appear to be the same, but the 5D III image will have more than twice as many pixels, so twice as much detail, which leads to better microcontrast, better sharpness, etc. etc.
If we factor in the larger lens aperture, greater light gathering power, lower noise, higher SNR, and all the other benefits of the FF camera setup...every aspect of IQ should be superior with the 5D III.