I am looking for a magazine or website review on the 1999-2001 S3. I have googled around a good bit and can find anything. I remember Motorcyclist, Cycleworld, etc. doing reviews and comparisons awhile back, but can't find anything now.
I have the PC III on mine with a K&N and the map that came in the box. My butt tells me it's faster across the whole range, but especially at higher rpms. Don't have any data to back up that statement. Sorry.