Behe is akin to ani.
BB is akin to disco rave party.
One controls a small area -> is a defensive structure (though can be used to cut a slice out of opponent's porc).
The other is a game ending weapon that puts the onus on the opposing team to attack or lose.
While there are certainly similarities, I don't feel like it's inconsistent. Game ending weapons consistently don't require grid because if you can afford them then connecting them to grid is such an insignificant deal. Anything that's meant to be used semi-defensively has energy requirement to stop them being put too far forward too easily.