I can promise you that you cannot look at the 0-60 times and justify which car would be better. There are to many variables that change that could effect that time. Time, Weather, Hot, Cold, Car running right, something breaking, losing traction, track conditions, Tire Conditions. Cmon give the Audi a break, they're a very nice car, sporty and very luxurius. I am sure the bigger motor will give your more of a push but then again they have stroker motors for the 1.8T. You can make the car fast just need money.
Hope this helps.
Adam~