Bell considers this. "Well," she said, "maybe you can. Maybe there's a boring way for magics to be different, like if a bunch of them only work in their own world, or something. Then it would be different because you couldn't float the same specific things without touching them, or whatever, and that's not a number difference. But I don't think there's an infinite number of ways for magics to be interestingly different. If the difference is interesting it shouldn't take forever to explain. You should be able to say 'well, I can make the weather do what I want, but she can make food appear, and he can do one or the other but it depends on what day of the week it is' - and then you find someone else who does weather and you talk to each other for a while, and you say, 'well, I'm doing it by asking the sky, and it listens to me, and she does it by waving her hands around in a pattern'. Any fiddly little difference that did take forever to explain wouldn't be interesting. Does that make sense?"