What's the difference between the two? I'm debating which to purchase now that I realize it's probably not smart to create my own RAID 0 external HDD with two 500GB HDDs with the owc enclosure considering i've never put together an external hdd in general. i've decided to shift towards prebuilt ones, by wd. only thing is, now i'm confused between the premium II vs the pro edition II. black vs white, but both are triple interface. what's the difference between them, and which should i purchase?