The E100rs has a progressive scan CCD with gives you full vertical
resolution compared to the standard CCD with only gives you half
vertical resolution. So the sharpness you see on the E100rs is more
then perception. On CNET they state that the E100rs picture quality
is equal to a 3 mp camera. I don't know if I would go that far. I
have both the E100rs and the C700uz and I find that they both
produce excellent quality photos for the level of cameras they are.
I would also include the C2100 into the mix. I have an example of
both the E100rs and the C700uz taken at about the same moment of my
family. The first was taken by my wife using the C700 and the
second was taken by me using the E100. I believe the picture
quality of the C2100 would be close to the same as the C700.