Canon Powershot SD600 vs Olympus Evolt E-500 camera comparison
It is preferable more 2.5" screen size on Olympus Evolt E-500 than 2.4" screen size on Canon Powershot SD600.
Olympus Evolt E-500 has 8Mpix and Canon Powershot SD600 has 6Mpix. It means that Olympus Evolt E-500 is able to produce pictures with more details (better quality).
Olympus Evolt E-500 has optical zoom 3.8x. Canon Powershot SD600 has poorer optical zoom ability of 3x.