Is there any difference between Keo Classic and Keo 2 Max, other than the metal plate and ever-so-slightly wider platform? They weight practically the same (Keo 2 Max is 9g lighter, per pedal). Look's site says the Classic is for "ROAD - LEISURE" use, whereas the Keo 2 Max says "ROAD - FROM LEISURE TO COMPETITION"...wtf is that even supposed to mean?