punctuality never killed anyone!
ill put it into simpler terms..
Basically they're extremely similar, apart from how they work feeding a ball... they have the same shells, same internals apart form bits which make them work differently, eyes is all it is!
HALO B w/ rip drive - halos run off eyes, like a gun, so it will feed a ball whenever it doesn't detect one, stock i believe they can feed 20bps
EmpireB w/ rip drive - Empires are sound activated, so whenever you fire your gun they will feed a ball, a belive stock they can do 22 bps (balls per second)
A rip drive is the same for both loaders, if your battery's die mid game, spin the rip drive to manually feed the balls!
hope that's clearer!