The superdrive is 8x vs 6x. In my expieriance though (search for a post from me from a fe days ago), it turns out that a 6x drive is actually the PEAK burning speed, on the outside of the disc. Short story is, you'll turn 3-4 x if you burn a ful disc, not the advertised 6. I imagine the 8x drive would average out ot be 4-5.