apersson850 wrote in post #17301555
If they have different sensor sizes then all other things are not
Except for older models with more read noise, the larger sensor is always going to give better IQ, if you do use the entire sensor for your final image, and are not cropping. All bets are off if you're cropping in a focal-length-limited situation. Before the 7D2, Canon had no APS-c camera that equalled the 5D3/6D/1Dx group in terms of read noise per unit of sensor area, but now the 7D2 does; about the same as the 6D, slightly better than the 5D3, and slightly worse than the 1Dx, but having possibly less banding noise than all of those.
I am not going to make many friends with the following statement, but those who like having fewer and/or bigger pixels because they give "sharp, crisp results" at 100% pixel view are engaging in self-deception, and are pleased not with real detail, per se, but with the artifacts of undersampling, which draw attention to the pixel structure of the image, rather than creating a virtually analog image. They are happier with their results also because they are magnifying their captures less with the bigger pixels when viewing at 100%.