Beats me, I guess it's individual perceptions. The 15" BAS to me seems like a lighter all around knife when compared to the 16.5" WWII which is the closest to it in that model. To me, the BAS seems even lighter than a comparable 15" AK, even though on paper they weigh about the same.
At the same time the BAS is very stout and I have no doubt can stand up to about anything you want to throw at it. But the big bellied WWII is heavier and longer and more of a chopper.
When Yangdu says that a 15" BAS is a good camp knife I think she is right on, and it could do just about anything in a pinch. But if I had to delimb a fallen tree or chop thru some comm block body armor I would go with the WWII over the BAS if given a choice. Conversely, if I was going to go on a long hiking trip and could take only one, it would probably be the BAS.
What the hell, just get both and then you'll be covered for either situation. (-:
Norm