Yes, Bob designed both, or at least had a hand in designing what you have; but as I understand it, the Colorbrator was his completely.
The Colorbrator is more or less, a more refined version of the Duocube.
I have both, have used both.
I think the main difference, is that the Colorbrator leads you to make a successful colour print, without any prior knowledge. That said, it is a bit of a steep learning curve, but it certainly does that. No other colour analyser that I know of can do this, all other colour analysers require you to get a perfect colour print first
I have to go out today, but maybe tonight I could look at both systems to refresh myself with what both do and their differences.
From just looking, I think you have the complete Duocube kit there.
Mick.