Porsche, for the past I don't know how many years, the Carrera has been looking like the same thing...Talk about creativity...The Cayenne looks like a modified Carrera...Look closely and you can see the head-lights of a Carrera...I'd rather buy a Lancer Evo instead of that piece of junk...

The 911 Carrera has looked the way it looks since the days of the old 356 in the 1950's. Porsche tried to break away from the 356/911 look back in the 1980s and got crucified for it. They tried to replace the 911 at the top of the model line with the 928, they introduced the 924/944 at a lower price point, they got their butts handed to them despite the fact that both cars (particularly the 944) were quite good. They learned their lesson and now all three of their mainstream cars have that 911 look.
All car companies try to share styling cues between models. Look at all the new models from any company and you'll see similar headlights and grills, etc. Porsche tried to make the Cayanne share a family resemblance, it's called brand building. The 911, Boxster, and Cayman share a very similar chassis which is why they look so much alike. This is actually a good thing as it builds a strong brand image in the customer's eyes. Marketing departments live for that stuff.
Even the Carrera GT (a totally different car from the 911 Carrera) shares some styling cues. The Carrera GT however looks very little like the 911, a significant departure styling-wise for Porsche. Although in this case it's strictly form follows function as the Carrera GT is an otherworldy car, looks and performance wise, kinda like a Ferrari Enzo.
I too would not buy a Cayanne. But a Cayanne isn't a sedan so nobody would cross shop a Cayanne with a Lancer Evo. Porsche doesn't offer a sedan so they don't have an Evo competitor.