Compare the BMW 5 Series M5 Pure Metal Silver Edition F10 - [2015] vs Porsche 911 GT3 Touring PDK 992 - [2021]. 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 Pure Metal Silver Edition F10 or the Porsche 911 GT3 Touring PDK 992. We'll leave it up to you to decide which is your favourite.