Both are fantastic colors. I have a 2000 M5 in Silverstone. I got Silverstone for several reasons. First, The exterior came with the matching interior also called Silverstone. The second reason is that BMW has never produced a car with this color. It was introduced as an exclusive to the M5. Now that I have seen some of the other colors available, would I change my mind? I don't really think I would. They were convincing reasons at the time of order, and they still are. Good luck with your decision. Remember whatever you decide, you can't go wrong with this car. I have put some pics of my car below. These are the 2 colors I am picking from, but WANT your inputs! Which one would you pick? Which one is more exclusive? thanx in advance!