I'm looking for the correct part number for the front brake pads of a 2016 435i xDrive Gran Coupe. Manufactured 03/2015. It has the M Sport aero kit but not the M Sport brakes. (rears are just basic floating calipers) Looking at RealOEM I think I need either 34106878878 or 34116878876 but these two parts look exactly the same and even cost exactly the same too. Are the front brake pads the same dimensions just with different compounds between non-Msport and Msport brake packages?