I did a comparison by recording some audio from Road Rash on my 2 model 1's one being the early TMSS Free High Definition Graphics model and the other being a late (V7 I think?) model 1 witch from what I hear is the same inside as a Model 2. Both recorded from the stereo headphone jacks at full volume into an ATi 650 Tuner card.
I can hear the difference myself.
http://www.youtube.com/watch?v=gFXCn...&feature=email

