Go with whatever you like and don't worry about other people having cars that look like yours. Chances are the only time you would ever see your car's "twin" is at a Bimmer Event with 100's of cars or on the internet. Since buying my M3 I haven't seen one like mine and it's 100% stock (I know that will change as years go by). That said my mother bought an Audi S8 about 18 months ago and I have only ever seen 2 other ones vs. my brother's Merc S550 in which I see at least 2 every day.
"The laws of physics cannot be repealed, even with DSC." - BMW Owner's Manual