I was driving a Cayman S and the Z car is a totally different animal. I know they are suppose to be competitors but the Cayman is much more comfortable and feels like the precision Porsche Euro sports car that it is and the Z car feels like a cramped Japanese sports car which it is. No comparison but I just wanted to try the Z car for a year or two but im going back to the Cayman S next time. Dollar for dollar the Z is a good value though and if you arent 6-1 like me its probably a better value . A smaller person might not feel as cramped as I do. I just fit in Euro cars better. Acceleration was ok but the Cayman S just feels more exhilarating for some reason.
Interior noise, interior styling around the shifter, fuel mileage.