Holy crap! I opened a real can of worms, it seems, by posing this question.
My main motivation was that, while I was leaning very strongly toward getting a Bushbuddy, I didn't have the information I now possess -- namely, what do you do if there's no dry wood available? I thought that as the Bushcooker allowed for the use of alcohol, and other "bio-mass," I'd be in better shape.
But, for all intents and purposes, reading up on people's reviews of, and experience with the Bushbuddy, it seems like the no-brainer choice. I'll just carry some esbit or FireLite tabs as backup.