Do different names for EPR mean anything?

[dsws]

As far as I can tell, every manufacturer uses a different name for their expiratory pressure relief feature, and every manufacturer has a slightly different algorithm for exactly how the pressure is adjusted. But do the names actually mean anything? For example, if a new machine entered the market, with an expiratory pressure relief feature that's similar to Phillips in some specific way, is there anything about the term "C-flex" that would make it correct or incorrect to say that the new machine would have C-flex rather than iPR or whatever the other names are?

[Julie]

I don't think it would matter. But then...