It depends. If the company is in SF, they'll either pay you an SF salary, or a salary relative to where you're working from (see Buffer's ad in WhoIsHiring). But more abstractly: don't take a salary you won't be happy with.
Which one is better hourly or a normal salary?
With hourly (as a contractor) your taxes will be more complicated, and you may get stuck with less benefits. Salaried, your income is more predictable, and generally works the same as it would if you were working "normally."
It really depends whether you want to work remotely long term or short term.