O.K Ray, lets do it, no subjective "artistic" opinions, lets do a proper objective scientific test comparing a P21 to a 1ds mark 3.
Most importantly lets agree on a sound methodology, after a few botched attempts to show the difference in examples which have quite rightly, been questioned because of variations in USM settings, contrast etc.
Here's what I propose to be a scientifically valid methodology (please correct me if I'm wrong)
1st lets test the most basic parameter:
SHARPNESS:
To do this we must realize that we are not testing the sharpness of the lens (which lens would you choose for each device, which Fstop would you use and what focal length) we are testing the sharpness of the capture device. Oh hang on, you can't do that can you? canon lenses doesn't fit on a mamiya.
Right, so at the first basic hurdle we have failed. Next step, lets realize it's doomed to failure as an objective test before we start. No problem, lets just shoot the standard lens on each camera, shoot a subject that is exactly the same for each camera at the same f stop. We will process the files with exactly the same software to get fair results. whats that? Different files need different software to get the best results. O.k. we'll use our preferred software for each camera. We'd better standardise the amount of USM we put on though eh? Whats that, different devices need different amounts of it, s how much shall we use? Hmm, I think we've failed again.
And that is just the start of testing the most basic parameter. What I'm getting at Ray is that it really isn't possible to give you what you want, you want an objective scientific A vs B test which will give us the answers. You know what, I do to, it would make our lives so much easier but that life. It means that unfortunately you have to figure it out through your own experience. Another way you can do it, as I have done in the past, is to figure out who seems to know what they are talking about, see what they say, see what they use and why they say they use it and take that as a guide, use the equipment yourself for a while and then you will know and understand it and it's limitations and qualities and then, you can make your own mind up from a reasoned and understanding place.