For the demon,
Efficiency is very good. Out of box, I was getting about 8-9 pods. After about 7 cases through, I was hitting the 10 pod range no problem. I currently get about 12 pods and a hopper off my 68 4500 tank. This past sunday though, I was getting 7 pods and a hopper off of 2200 psi, which comes to about 15 pods off a full tank. Pretty good by my standards when I usually come onto a field during an event with at least 9 pods, sometimes as many as 14.
Smoothness was very good as well. I have no noticable kick on mine, which allows me to hold a constant lane. The feel is almost identical to that of a luxe with smoothness.
The sound isn't much either. I would say it sounds like most other spools, but definetely quieter than a geo or nt. Between the clone and the demon, there will be little difference in sound if both are tuned properly.
Evolution Sports Zombie Unicorn Attack