I never said I can tell them apart. My point was, almost nobody can...
What "better results" are you talkig about. I meant to say: you can't trust your lens with anything, you have to watch out or it will fail you.
When I take a camera it is myself who is generating inspiration. The camera is good when it "knows" how to get out of the way. It's just an instrument. For want of a "glock" you can achieve the same result with a crowbar.