>>11864371Most GameCube models support digital out, so if you're using a modern display you can get an hdmi adapter that doesn't need to be converted, so no input lag added. Crystal clear output, and it looks amazing with a quality upscale. Wii supports component out, which can look nice if you're using quality cables. An hdmi adapter will need to convert from analog to digital which can add lag.
Other than that, there's isn't much difference besides other minor things.