Bushbuddy does not do too well in the wind (just like alcohol or even canister stoves) without some wind protection. In bad weather you might have wind plus poor/wet fuel, and all of that combined makes it a bit more difficult to use. It will work fine but there is some skill involved in getting a fire going etc.
The backcountry boiler is really easy to use and get a fire going, I think it is because of the chimney affect, and burns like a little furnace. And if it is windy it works even better because you point the intake into the wind and it's like you are blowing into a fire. I would say there is less skill involved in using it.