The official Brazilian EA site has a few more details on the Collector's Edition:
* 3 new cars - Porsche 911 Carrera, 2006 Nissan Skyline GTR Prototype and 1970 Dodge Challenger
* 10 exclusive modified cars
* 6 new races in Challenge Series
* 10 new exclusive Vinyls
* Bonus DVD
* Coming out November 9th
Source:
http://brasil.ea.com/games/8827/4520/
My question is, what happened to the other 3 cars (Koenigsegg CCX, 2007 Camaro Concept and Nissan 240SX) which were considered to be exclusive? Plus, why would they make the 911 Carrera an exclusive car? It's not that special, in my opinion.