Help!! M5 Competition or M6 GC non-Competition?

I'm being offered a 2014 M5 competition edition in Singapore Grey Metallic and Sakhir orange interior or a 2014 Alpine White with Amaro Brown interior non-Competition edition. The M6 gran coupe is a better looking and more unique car of the 2 I believe but the M5 brings 2 desirable options being the B&O sound and Competition. Any advice or suggestion is greatly appreciated.