I wondered the same thing before buying. There is only one main difference between this and the other Opal kit.
-This Opal is BLACK.
-The other Opal Kit by itself is WHITE.
The only other thing to note between the two is that the Starry Eyes Opal kit, (with the black machine,) comes with a Lancome Genifique Eye Cream sample, which is great and expensive on its own, the regular anti-aging eye serum that they both come with and a free Lancome small size mascara that works pretty well.
*Personally, I like the white Opal much more. 1 - it matches my Clarisonic face brush, and 2 - it looks cleaner for much longer. I've had the black one for about a week and while I love it, the physical body does show scratches, finger prints and the like A LOT more. Still, who cares about the body itself as long as it works, and for the 2 freebies from lovely Lancome, it's a steal! I'd repurchase the black packet again, but I do wish they offered it in white.