The SMS' resolution might be lower than its 16-bit brother's, but the difference between s-video and composite is nonetheless outstanding.

Down below are some composite video screenshots which will turn to s-video screenshots when you bring your pointer over them. I opted for a roll-over approach so it makes it easy to spot the difference and toggle between composite and s-video at will. All you have to do is to bring your mouse pointer over those composite video screenshots to bring out the equivalent s-video screenshot.