Not exactly for back packing but I have used both a folding pruning saw, and a folding camping saw. I am not sure what the difference really is as they look about the same to me. Marketing I guess.

They both did a credible job of sawing thru 3 or 4 inch chunks of wood.

One of them I keep in my car kit. Not sure what happened to the other one.
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Warning - I am not an expert on anything having to do with this forum, but that won't stop me from saying what I think. smile

Bob