I'm not even close to expert on either, but I'd guess there were no, none, nada, zero, zilch revisions to the Vectrex or the Colecovision. (I wouldn't count the Adam, personally.)

The VCS/2600 went through many iterations, and the Intellivision had a few as well.

And of course there are the systems that failed so clearly there was never any time for a revision - Channel F, Studio II, etc...