I drove both and ultimately canceled the Turbo I had on order and bought the GT3. You can analyze the differences into the ground over the internet, but at the end of the day it was the test drive that made it clear the GT3 was the car for me even though it will be used 99% of the time on the street. Drive a GT3 and you will have your answer.

I had a turbo s and got bored of it , when i test drove a friends GT3 I knew i got my porsche passion back and immediately booked one and sold my turbo s