That said, if you do get the right size container that happens to have butane in it (unlikely, but conceivable), it'll work. Butane burns sootier, but they're the same chemical. Isobutane is an isomer of butane; the difference being that butane creates carbon (soot/smoke) if there's not enough oxygen, which'll clog your stove. Isobutane doesn't do that. You're probably not even going to be able to find butane canisters that fit, so it shouldn't be an issue.