the Super drive has gone out on my Macbook. i have been searching online to buy a new one and have found some choices, but i have also found that the Mac Mini has a Superdrive now, and the Mac Mini option is at least $50 cheeper then the one advertised for the Macbook. My question is, are they actually the same thing just advertised differently? could i replace my Macbook Superdrive with the Mac Mini version and save a bit of cash? thanks.