From someone who works in BMW service, let me tell you that the E90 M3s are potent performers and MB should not even be in the same sentence. Until you actually drive an M3, you have no place to make judgements. Interior may be important to some, but overall driving experience is top of my list and the M3 is worthy of top honors IMHO. Either drive one, or STFU about things you're speculating on.
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