I thought I was remembering something more definitive but this could be the post I was thinking back too.
How it might be different? You could have two tags in your pocket Or you could in theory have two tags printed in one with the images overlapping. That would be distorted. You can listen to two audios at the same time on different speakers and devices. Or you can play them with the same device and speakers and who knows how much of each audio file is being accurately represented and to what degree.