Does video matter on these cameras? They are marketed for serious photographers, but even they can demand convenient video capture at times. The Sigma DP1 records terrible quality, 320x212-pixel 30fps video. It is likely that your kid's phone - the one that came free with activation - takes better video. On the plus side, the DP1 offers a digital zoom in movie mode. The baseline video quality is bad enough that the zoom really doesn't make it worse. For whatever reason, the DP1's video can use an existing custom white balance, but the user can't set a new one in video mode. Go figure.
Canon makes better video cameras than the G9, but for most spur-of-the-moment uses, the G9 is fine. Zoom and other settings, including custom white balance, remain functional. The G9 shoots at 640x480 at 30 fps, as well as 320x240 at 30fps, and 1024x768 at 15fps. It also shoots time lapse at 640x480 with a frame a second or a frame every two seconds. We didn't do quantitative tests of movie color on either camera, but the Canon's movie color looks a lot like its JPEGs.