Shot this Church with three cameras:
Olympus UZI (C-2100UZ) 2MP
Olympus E-10 4MP
Canon Digital Rebel 6MP
I framed each shot similarly. Since the aspect ratio is different between the Rebel and the Olympus cameras they of course are not identical. I used the vertical height to frame each shot. The sample picture has been resized. The three crops are 100% crops from the same area of the photo. No post processing whatsoever. Nothing scientific just a good example of what higher resolution will get you.