Just to point out, but you can have all superior technology and airpower you want, yet still not come out the winner, and probably come out the worse for ware. It's a matter of how you use that superior tech and airpower, and how well your enemy can defend from it, that properly decides the end.
Generally however, those with greater technology and equipment usually come out the victors. Not always, but I would say a large portion of the time.
My point however, was to make a comment on the OP saying that the Enclave would win based on sheer numbers, which isn't an argument I've heard in regards to the Enclave. The Legion? Yeah. The NCR? Definitely. But the Enclave? Almost never. Unless we are talking just about the East Coast BOS I suppose. I'm not entirely sure what the numbers of the BOS would have been in Fallout 2, but I would imagine they were much certainly larger than what the Enclave had.
Generally I would imagine the ability of the Enclave to defeat the BOS would rest on their technological power, not on numbers. That has always been the strength of the Enclave.
Long story short, a BoS Bunker is not something that can be taken easily without the attack getting heavy casualties
If there's ever been a faction which could capture one without sustaining major casualties, it would be the Enclave. No other faction for instance, has maintained a standing policy of capturing and using dangerous bio-weapons like the Deathclaws and (in terms of viruses) the FEV-Curling 13.