I test drove a WRX and loved it. The salesman told me to stomp it and the turbo kicked in and I was flying around curves at 80 without even braking. The AWD is great and the juice in that sucker really feels good. Its a smooth ride, looks cool, and has a good amount of space to boot!
I can't judge the Audi though...never been in one...I did thoroughly enjoy the WRX though.
Not an owner, but my opinion might help ya. If I had the $25K lying around to get the WRX I would.