Halo B - Halo's are much heavier. A Vlocity Jr. uses a similar paint detection system, although the Vlocity's is far more reliable.
Reloader B - Reloader's are heavier, but much faster in the long run. And with the sound activation they are more reliable.
Eats batteris like no tomorow
I got this a few months back when I ordered my '05 Superstock. This hopper will do a ligitamate 20 balls per second on the gun and I have never had a miss-feed or any problems with it in a game. It does however put a constant tension on the balls while they are sitting on the drive cone, which can become a blender for fragile paint, and since you can't adjust the speed or tension like a normal VLocity, things can get very hairy. Although if you play at a field that has paint with a relatively solid shell then this thing runs like a dream. The small profile makes perfect for a frontman like myself, and the act that it is very compact makes it great for playing bunkers tight.
Taking it apart, I found it to be far easier than a Halo or Reloader to work on and it has a much better reading system than a Halo. A Halo has eyes that are uncovered in the feedneck of the loader, the VLocity Jr. has a clear plastic piece over the eye sensors so if you do break paint it will still feed.
Overall a great hopper. It is fast and reliable, and will take the abuse you throw at it. I would recommend this to anyone that doesn't see the need for all the modes of a full VLocity and wants a speed machine a a smaller lighter package.