I've had the chance to be at the track with the car previously and it sounds good. It's hard to describe, but it doesn't really sound like a TT V6. It's got a pretty burly mechanical tone to it.
I'd love to hear one in person vs my laptop.
Most V6's have similiar sound. I give it 3.5 out of 5 for sound under load. Not enough to make you feel intimated but cool enough to say, "what was that"...