Another part of the picture is the blade length issue. the C/U 7 is seven inches because that is the lengh of blade commonly accepted in the military (Look at the "kabar" or marine combat model, it is that lenght, I believe.) The 9 incher< isuspect, is partly marleted towards those combat individuals who aren't restricted by the 7 inch limit. If the crap hit the whirling thing, then the extra 2 inches could make all the difference. Also, a 9 incher would make a better hacking tool, a better inprovised shovel, a better improvised hammer, etc. Good combat tool, if one is allowed to carry it.
If I had one for camping and such, I would take along a smaller folder. Folder for fine work, Becker 9 incher for chopping, camp site making, whacking sandwiches in two, etc.