Videomaker – Learn video production and editing, camera reviews › Forums › Cameras and Camcorders › Consumer Camcorders › SD in 16:9 › The difference is your 16:
The difference is your 16:9 footage will be enlarged and fill your HD screen completely. With 4:3 footage, the image is enlarged, but black bars remain on the sides because the aspect ratio don’t match.
I don’t think there is a difference in quality. I believe both the 4:3 and 16:9 footage are upscaled equally. But the upscaled 16:9 is probably more pleasing to look at.