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M Brakes don't have the slotted and dimpled rotors. Those are on the M Performance BBK.
I had the 2wheel StopTech kit on my E46 but with the F30 I would go with M Perf BBK because of the coding which take advantage of the four wheel brake upgrade (ASC, DSC, ABD, etc). It would be a struggle to get the same coding done with the StopTech kit.
And yes all these systems are tied into and affect the brake system.
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