People seem to be missing the biggest differentiator of the lot - who is the better driver? Having taken a Zed and a Cayman (and S) around the track, yes the Proker is faster and more clinical, but if you are a better driver than him, you will beat him A-B. Hell, you dont even have to be technically better than him, just know how your car handles better than him. I've seen fast cars be beaten enough times by sheds to know the biggest factor is who is the better driver.
So get some driver training (if required) and whoop his ass