Compare the Seat Leon ST Cupra 300 DSG 4Drive - [2017] vs BMW 3 Series 335i M-Sport 2d E90 - [2006]. 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 Seat Leon ST Cupra 300 DSG 4Drive or the BMW 3 Series 335i M-Sport 2d E90. We'll leave it up to you to decide which is your favourite.