I agree, not much difference. A good quality, sharp pruning saw will work very nicely as a backpacking saw. Perhaps even better, since some stuff I see that's sold as a "camping saw" is disposable garbage. For example, I bought a Gerber slide-out saw that seemed like a bargain but the blade turned into a pretzel in minutes; yet Home Depot carries a Fiskars that looks very similar but is of much better quality. Weekend car campers will toss something that breaks into the garbage; gardeners/arborists will return it to the store and give some pointed feedback as they demand a refund.