If you're in the market of buying yourself a high end luxury vehicle and you were down between those two choices. Would you chose the mercedes cl550 with AMG package or the bmw M6 coupe?
Please don't mention any other cars besides its main competitors if you wish.
Please don't mention any other cars besides its main competitors if you wish.

The M6 is mechanically identical to the M5 except the exterior design.
Mercades is what it should be a different model with its own engine and such.