In theory a larger sensor with the same pixel count as a smaller sized sensor should delivery better dynamic range because the larger photosites don’t suffer from the same noise and overload effects. Although not a very controlled test because of different cameras and lens qualities I wanted to show if there was any perceived difference at 1080 resolution. Covering both stills and video using the EOS 60d, Pansonic GH1 with hacked video, FZ100 (stills only) TZ20 and LX5 and the Sony HX9V. I set up each camera to sunny white balance and tried to get apertures as close as each other as possible, about f8. I invoked any incamera dynamic range tools such as icontrast and iresolution, it worked well with all but the LX5 which gave a very flat looking image because of the boosted shadows and flattened highlights. It show some cameras fair better at stills than video and others are much more video oriented than stills.
From the centre cropped images you will get an idea of resolution and noise. All images were taken at ISO100 and in bright sunny conditions.