hmm, difficult one...
Seating wise, I like the traditional Dragon Kahn way better.
Elements are almost the same, but then again, the Immelmann on Superman is better than the Dive Loop on Dragon.
I also dont like Mid-Course-Brakes, because they take thrill. So a plus for Superman.
All over the themeing on Dragon is better, because Supermans tack is mostly un themed.
I dont really care about the number inversions, so none of them get a plus. But then again, Superman has the airtime hill, which adds to the thrill.
I also like the two helixes at the end of Superman.
Ow, and what is funny too is that I love the straight drop right after the lift on Superman. I dont like the turn Dragon does after the pre drop. I dont know why... hmpf
I guess all in all u can tell that I definitly vote for Superman in this case.