I have to admit, the S95 just has a very nice-feeling body. It's well built, with a slightly more textured finish than the S90. The front ring can be set to control shutter speed, ISO sensitivity, exposure compensation, manual focus, white balance, stepped zoom, i-Contrast, or aspect ratio. The functions can be set independently of shooting mode, so that, for example, it can control focus in Manual mode or shutter speed while in aperture-priority mode.
One not-so-pleasant holdover from the S90: the inconvenient flash placement. Although it makes sense from a red-eye prevention perspective, most people hold their fingers right where the flash pops up.