I can't speak to the difference between the two, but it appears to me that the Hurricane is simpler and easier to maintain. I recently had routine service on mine performed by the manufacturer in Vancouver WA.
I can say that they are definitely great; we have relatively quiet, uniform heat and unlimited hot water. Because they operate off of the main diesel tank, they essentially have an unlimited fuel supply.
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Joel (AKA docj)--
RV Technology Specialist
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