General image quality

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This shot highlights some of my nitpicks with both cameras. The iPhone shot is sharp, mostly because it chose a low ISO sensitivity, and thus doesn't suffer from the noise-suppression-induced blur that the 100 HS has. It also helps that the iPhone's autofocus is way more intelligent than the 100 HS' and didn't choose to focus on his shoulder rather than his face. On the other hand, the iPhone's lens is quite subject to fringing and flare. That pink tint you see on the right side of the iPhone shot is lens flare. Notice how clean the same area looks on the 100 HS shot.

(iPhone: 1/120 sec, f2.4, ISO 80, pattern metering, AWB; 100 HS: 1/250 sec, f2.8, ISO 320, evaluative metering, AWB)

Read my analysis of this exercise.