If you use the Angel intellifeed then the paddles go slower and it works off the gun's battery, which is not the best really in my opinion. But the fact it turns for every shot is useful.
Hence the reload. Which works off the hopper's batteries (so paddles turn at a decent speed) and turns for each shot. It's the best of all agitating systems in my opinion. It's the most reliable gravity feed loader.
If you want to go faster you need to go force feed, which means warp or halo. Some angels need new ball detents or are not happy with force feed loaders. Others are just fine.
It's not the halo over forcing the balls (at least not with the Halo B) it's because the Angel detents are weaker, the angel breech bores are larger and because the bolt sits a bit further back from the feedneck. All of these things together allows a ball to move forwards or backwards a bit and another one to partially load which then gets hit and broken by the gun's bolt.
WDP uses a Halo to demonstrate how fast their guns can go in their video's so it's not always a problem.