Only thing to add is base model has black radio ***** and a black lighter. I also think it has drum brakes on the rear. Don't hold me to that but I thought there is a difference in types of brakes. Also I think the shifter is a different color. In 2006 there were some special editions which were red with SRT wheels and base model interior. I have never looked under the hood so I can't speak to that. The grille is different on the base. Good look in your search. The cloth interior has like a black and gray swirl to the seats in the middle. Base seats are not power and no heater in the seats. Maybe someone else can give some other things.