The Perry and Cline/Iron bay are two entirely different units; it's difficult to draw a comparison between the two. The Perry is a pump while the Cline/I.B. is an on-demand regulator with the crankcase supplying pressure to the tank and pushing the fuel, rather than pulling.

The I.B. is nicer looking and, depending on how you view it, higher quality. The Cline, on the other hand, is adjustable to some degree which the I.B. isn't- at least not in its current configuration. I've used the Cline and have an I.B. on the shelf NIP. The Cline is not necessarily a "plug and play" unit and can require some finessing to make it work properly. I've heard some people say they installed the Cline and forgot about it and I have no doubt that's true- but it may not be the case when the next person tries one. Not trying to put the Cline in a bad light; it's just something you need to keep in mind.