Correct, only forced inuction engines can get increases like these. NA engines get much less gains for same money.

 

I had 09 and 11 cayenne turbos. Just got '14 cayenne gts and love it. Better than the turbo. I spend quite a bit of time on tracks with my other cars. The handling, lateral g, immediate throttle response and exhaust makes the gts better (at least for me)

 

buy the cayenne turbo and invest in exhaust , you will have zero lag ,
or way not the new macan turbo , it weights only 1.8 tone with pdk and 400 hp and it is a new model

 

Did you get PDCC in the GTS?

 

Yes. It definitely makes a difference with body roll.
My kids are a bit less nauseous now when I take turns
Avoided torque vectoring which I didnt like at all in my other cayenne. Now the steering is more linear and predictable.