Does anyone have a point of view about which canon is better, the SD550 vs. SD600? They appear very similar in most regards except the SD550 has a 1/1.8" CCD while the slightly newer SD600 has a 1/2.5" CCD. I asked someone at Canon who said that the SD600 CCD had newer technology that provides low noise even though the sensor is smaller. My guess is that there is just more noise reduction processing going on in the SD600.
Does anyone have any experience with which camera takes better pictures in low light?