Both cars are mine, i always felt the x5m was a bit faster off the line and even from a roll.
2010 m3 mods include RE SSK, AFE Filter, Fabspeed XFC / Xpipe, Exhaust, AA ECU 1.5v, BMW PSW, Envy Charger, Pilot Super Sport Tires 285/rear
2011 x5m : K&N fitler and everything else
see video's below
Had i launched controlled the x5m it wouldnt' have been pretty ..