Certainly you can do that. You can also very easily check your camera to see if it meets specification. Gain, dark current, linearity, well depth, cooling capacity.
When comparing images there are many factors in play. Not least of which are optics, sky conditions and processing skills. Personally given what can now be done in software post processing it's not clear to me how you would isolate the camera from all else that is in play.
However, I realise I am in a minority on this issue in astronomy but not it seems with general photography where they seem to value measurement as well as subjective comparisons.
Regards Andrew