The one thing I love/hate about the central vacuum business, is that the SAME tool sells under 9 names with different price tags. I've configured my system to use the standard 1.25" tools, and that's been OK for me...having the widest selection that way. The "generic" nature of CV stuff keeps the door open to create my own breed of vacuum, rather than being stuck with whatever Brand X wants to sell me.
All you have to do is have a look at a big CV vendor's website, and you'll see the exact same tools named Nutone, Imperium, Electrolux, etc. Same goes for hoses.. Same thing, many names... only precious few companies have a proprietary hose (which I'd prefer to NOT have).
Even powerheads are like this... lots of names for the same thing. Heck, the classic Lindhaus PN12e and PN14e are sold as Imperium, MD, and others as well as with the Lindhaus name on them.
There's actually some really good deals to be had on Ebay with the tools having no name. I can't find any differences from the branded ones.