You're kidding, right?
Both of them are just basically pursuing the Bush agenda. Obama has some more detail in what he'll do. The space council thing is mildly interesting, at most.
Bush at one point tried to kill earth-monitoring satellites so we wouldn't have data on climate change, but he got shot down. Obama makes clear that he'd continue monitoring, McCain makes a cursory supporting statement.
I'm a strong Obama supporter for non-space issues, but the candidates have very little daylight between them here, or between them and Bush.