Refire05GT

After sampling different sound bites from various axle-back sound bites, I think I like the Bassani the best. What I'd like to ask since I can't seem to find any info on their website, is what is the difference between the Bassani SS Axle-back, and the Bassani SS Race Axle-back, AND if possible if anyone might provide a link to a sound-bite of the Bassani SS Race with a stock h-pipe, or if anyone here has this installed and can comment on performance/sound. Thanks