I think you posted when you first had the car that your brother has a F430 and 1M felt faster, am I remembering right?
Other than an in-gear acceleration time I don't think a stock 1M can be faster than a F430 either rolling start or dead start, no data supports this. Videos show us that you do make better launch than the driver in F430.
With a few mods a similar performance can easily be achieved from 1M though.
"The mark of a great car is one whose overall competence exceeds what you should expect from its individual components and the 1M does just that", Chris Harris.
2011 BMW 1M: TECH: Evolve Race+N55mids, Evolve IC, Michelin PSS, ER cp, aFe filter, CDVx, Vorshlag camber plates, P3Cars, OCC EXTERIOR: trunk spoiler, blacklines, black grills, IND goodies INTERIOR: Alcantara steering wheel, steel pedals, custom mats, MPower e-brake.