Sport vs M-Sport Package

Hi everyone. I'm looking at picking up a 2011 E90. I wanted to know the difference between the Sport vs M-Sport packages. The front fascia is obviously different, as is the grip on the wheel (Though I believe it is the same diameter). What else is there? I found a sport package equipped car that Im thinking of pulling the trigger on, but want to make sure I shouldn't hold out for a M-Sport version. Thanks for any input