Both torches operate perfectly on propane. Both operate admirably on natural gas...but the Minnow needs a little more pressure than the Betta. The Minnow is so new we haven't done much testing on the concentrators yet. I'm thinking one would be enough, but that is not "official"....as I said we still have to test. If budget is a big issue, personally I'd vote for the Minnow.
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