Compare the BMW 5 Series M5 Competition Pack F10 - [2013] vs Mercedes C Class 63 AMG Edition 507 - [2013]. Find out which car is the fastest, most powerful, lightest or has the biggest engine in our top trumps style comparison page. Find out which car has the highest top speed or is the fastest accelerating, is it the BMW 5 Series M5 Competition Pack F10 or the Mercedes C Class 63 AMG Edition 507. We'll leave it up to you to decide which is your favourite.