To be fair darth... while most people can't tell the difference... and in fact the VAST majority of people don't even have the setup you'd need to hear such a difference...(and still probably couldn't.)
People THINK they can hear the difference.
So if you had the 360 and the PS3 versions and the PS3 version is said to have uncompressed sound they would think the PS3 version sounded better.
While in reality it would sound the same to them... they would still get more enjoyment out of the PS3 version due to them "tricking" themselves...
So.
It's why dozens of decisions in marketing are made. Ice cream containers are made a certain way because it makes the icecream taste better in peoples minds. Stick margarine is wrapped in foil for no reason... and also yellow for no reason when naturally white...