Cayenne's are much different, and wayyyy better IMO.
could you elaborate on that a bit. the vw is built off the cayenne chasis, the exteriors are slightly different, all the motors except for the turbo ones are the same. the v8 in this is the same as the v8 in the cayenne s, just detuned a little, 310 vs 340hp. i bet the only difference is in the software and a more restrictive intake. i think the wheels on the vw look better than the ones on the porsche. as far as i can tell the interior is the exact same. i test drove both and cannot tell the difference. the suspension in the porsche is probably a little more sport tuned just because it is a porsche.
the vw is practiaclly a rebadged porsche with enough little things changed so that they can call it something else and sell it for less. its the same way that some nissan's are practiaclly rebadged and sold as infinity's for more money. yes i agree that a cayenne is better, but not wayyy better and they are not way different. the changes are like the difference between a m and non m bmw.