[Randallw]

My technical manual has a single picture for both of them

Type: Scout (B'Rel); Cruiser(K'Vort). Common planform, scaled up 4.3 times for cruiser.

The B'Rel has a crew of 12, and the K'Vort 1500.

You'd think the difference would be that the K'Vort has more decks and more windows on side. Of course, in DS9 they just shrank the model when they wanted the difference within a fleet.