If the power dome wont be such a prominent feature on the on the new M3, I've got to believe that BMW will include some unique aspect to the appearance to ensure none of us will confuse it with the f30...besides quad pipes and wheels.
On order: 2015 M4, ZEC, M DCT, ZLP, Adaptive M Suspension, HK Audio
2015 X3 xDrive3.5i, BSM, ZPP, ZCW, Nav, HK Audio
2013 135is (N55), Carbon Black, ZPP, ZTP, DCT, HK audio, heated seats
Previous - 2010 e90 335i (N54), BSM, 6AT, ZSP, ZPP, ZCW, Hi-Fi, Nav, BMW PPK & PE, Dinan S2
Previous - 2007 e90 335i (N54), BSM, 6AT, ZSP, ZPP, ZCW, Hi-Fi