Ok... I think I got my confusion under control. Here's what I think I've figured out.
1. CBOB is the Classic stainless COMMANDER frame and slide, with a bobtail. No longer produced.
2. VBOB is an updated version of the CBOB, slightly different checkering, maybe different sights and grips. Small changes.
3. Guardian is a VBOB with an alloy frame.
4. CCO is an officer's alloy frame with a Commander slide
And in order of preference, I'm preferring
CCO in .45,
Then... oh my.....
The Guardian in 9mm (if I ever get the extra money)
Sounds about right. Dontchathink?
Da