I'm a BAS fan. Especially the Bura and ! BAS's I just got in the last few months - both lithe and pointy.
My Sher WWII is more beefy, and definitely a worker before a fighter. But then it's an 18-incher, which are known for having long, thick handles. I also like the BAS over my 15" AK - also a chunky blade by Shankar. AK has more belly that gives it a forward balance and clear chopping power, but the BAS has a more neutral balance and is absolutely deadly on green wood and brushy stuff.
Two other things in favor of the BAS - light weight and compactness. If I'm going to haul a khuk all over creation, it' s probably going to be a BAS.
I believe Rusty has said he prefers the 16.5" WWII to the 18" model for reasons of proportion and balance. He may convert me yet - I still haven't found a 16.5" WWII in my hands, but it's definitely on the BUY list.