The G11is the more expensive camera, but both cameras performed very well in our tests. Both had excellent sharpness, but the G11 had less noise. The HZ15W, however, had more accurate color in both still images and video. It also had sharper video, so the HZ15W may be the better pick if you need to shoot a lot of video.
Both cameras also include full manual modes, but the G11 provides much easier access to the controls of this mode, thanks to the various dials and buttons on the top and the back of the camera.