The BRB systems are well made, work well and are much cheaper.
The parts / components on the BRB wired system are interchangeable with the Canterbury wired systems. We originally bought Canterbury systems for our 4 trap fields but buy and use BRB replacement parts as they are much cheaper. BRB weren't around when we were purchasing the new systems. We've had to replace control boxes, mics and a relay. All BRB components on Canterbury units. If we needed to buy another voice release system I would buy BRB.
The BRB wireless system is NOT interchangeable with the Canterbury wireless. A club I frequent have both the BRB wireless and Canterbury wireless. I can't tell the difference.