Black cloth is what I will most likely be getting in my white R/T when and if I get it.

And about the room in the back in the Mustang: I currently own a 05 GT and you would not with that on anyone. My wife has a 99 v6 and that has more room in the rear for sure. Challenger is supposed to add a full 3 inches of legroom when compared to the Mustang. That might make all the difference in the world.