SCB is fantastic and I think I have to give it the edge. Since getting it I've mostly stopped playing Muffin Knight even though I like that game a lot too. I had never played SCB before. Mind you, I have an iCade, and had I not I probably wouldn't have been so taken with it initially. However, since learning to play with iCade I now find I can play pretty well on my iPhone too, so even the virtual controls have grown on me (though not on iPad where the controls are inexplicably reversed, which is maddening - hopefully they change that). I think SCB is a bit more addicting, in part because it's so ridiculously fast paced. It's easy to find myself playing game after game, trying to get a better score. MK has that too, but SCB takes it farther. Plus, even though I never played it before, I'm certainly aware that SCB is the original. So while it's not nostalgia, there is a recognition of the original there.