In DigitalCameraInfo's Nikon Coolpix S630 vs Panasonic Lumix DMC-FX580 / DMC-FX550 comparison, Tim Barribeau wrote:
The touch-screen system of the FX580 is well implemented in that it complements the button controls nicely. The only time you need to use it is for exposure compensation, or shifting aperture and shutter speed. The majority of controls are handled using the buttons, but with the additional capabilities of the touch-screen complementing these, rather than replacing them.
In terms of image quality, however, the Nikon substantially outperformed the Panasonic. In every test we ran that didn't involve video footage, the S630 handled better. The images were sharper, the colors more accurate, and the image noise lower. However, once again the Nikon's low resolution and lack of controls in video mode hit it hard, leaving it far behind the Panasonic.