I have used both, and know the Iron Bay regulator inside and out. The Iron Bay regulator is the only true regulator. I have been around since the development of the Iron Bay, and have even had a hand in it. It works on the principle like a scuba tank. You pressurize the tank, and it forces fuel to the back of the regulator and then the carburator vacuum opens the diaphragm letting fuel through. The Iron Bay is also machined aluminum instead of plastic. I can tell you anything you want to know about the Iron Bay Regulator. Yes, i do work at Iron Bay, but do mostly flights for the UAV program that we have. Feel free to PM me if you have any questions...which motor are you planning on using it on?

Arch Stafford