The appropriate tool depends on the basic assumptions -- what is this saw supposed to achieve?
If it's emergency use, fuel and shelter, then the old school sierra saw is enormously effective. I use several of the $8-10 Coghlans jobs for pruning of my (hundred+) shelterbelt and fruit trees; they are both sturdy and effective. For backpacking, I would ditch the handle and pack the blade by itself, with a guard taped over the bottom third (details on request) -- two ounces tops, for a lot of capability.
On the other hand, if it's rough terrain where you expect to clear the trail -- or chop up standing deadwood for warmth -- or thin out small, live evergreens for shelter/bedding -- a genuine swede/bow saw is a workhorse that never quits. Even a 12" job can move mountains.
BTW, I own and use all of the above (except the Laplander, which is intriguing but pricey). My philosophy is simple: I'm just not willing to schlep stuff I don't need up a mountain pass. Call me lazy if you will.