Everybody IS getting the same audio output. If you pay then you get it tailored for the shape of your head and ears. It doesn't change the quality of the audio at all. We all get the enhanced audio for free. If you watch XclusiveAce's video he even states that he's done some research into this and it seems that the opinion on the paid part is very varied. Some people say it's great and some say it does absolutely nothing. It just seems like a gimmick to me and you'd have to be stupid to pay more money just for the chance that it may improve how you hear things by a little bit.