Depends on what other things I would like to study at the time as either could be useful in a few subjects, although I am one of those people who thinks advanced math is more useless than physics would be unless you are planning on using it in other subjects (this may stem from a bad year of geography, but whatever, neither the time nor place for that one). Assuming time and stress were not a issue, however, I would like to take both anyway as I would like to study things that involve both.
My speech over with, WYR visit the International Space Station for two weeks or the moon for three days?