Advantages of the Canon S100
Much higher true resolution 12 MP vs 10 MP
Higher resolution movies 1080p @ 24fps vs 720p @ 24fps
Shoots higher resolution Full HD (1080p) video
Better maximum light sensitivity 6,400 ISO vs 3,200 ISO
The S100's maximum light sensitivity is 1 f-stop better
Significantly better wide angle 24 mm vs 28 mm
Records high-speed movies 240 fps vs None
Has a CMOS-family sensor CMOS vs CCD
Has a GPS Yes vs No
Continuous shooting Shoots significantly faster 10 fps vs 1.9 fps
Better macro capability 3 cm vs 5 cm
Slightly more zoom 5x vs 3.8x
Slightly smaller 99x60x28 mm vs 99x58x29 mm
Slightly thinner 1.1" vs 1.2"
Faster max shutter speed 1/2000s vs 1/1600s