I see and of course understand your point conropl. And you are correct. But if we have 1 biger pixel and 4 smaller pixel, you can not say, that this one bigger will produce stronger signal with less noise. Because maybe that 4 smaller pixels together would produce 2 time stronger signal comparing with that 1 bigger pixel (if the smaller pixel number would be enough bigger).


The main misunderstanding comes from that we are trying to meausre noise level, but do not compare things equaly.


Because there is 3 varying things:
  1. pixel size
  2. sensor size
  3. technology



If we would compare only one thing, leaving two others as constant, there will be less misunderstanding []