As stated above, very similar. In my experience, the Audi is a much better ride for the increase in price.
I had a '98 GTI VR6 that I loved and put on 100k with zero problems. None. Oil changes with synth, plugs, wires, belt...that's it. The kicker for me was that Audi service appeared to be way better than VW service. Two weeks to get an appointment for them to take my VW with CEL, but when my boss had CEL in her Audi, they came out and got it...same dealer, same week. WTF?
Not to hijack, but the real problem with VW/Audi is that their product plans are totally jacked. Why did they kill the 1.8T? Why kill the VR6? Why not bring over more R32s? Give people what they want, or at least have some logic behind these decisions. My GTI was fast, reliable and got great mpg, as was my wife's turbo new beetle. Those engines are no longer available. Anyone know why?
We used to own 3 VWs. I don't know if I'll go back.