Are you asking if anyone has had two Red Wine Teacs in this configuration, or just any two Teacs?
I have used passive pre, SS pre, and tubed pre. I like the tubed pre best - hotrod Hagerman Clarinet.
I ran two stock Teacs passively biamping my old speakers (Totem Rokks) but found that a modded single Teac was better - please note, my modded Teac is not a Red Wine DC unit, but a modded unit that still uses AC.
I actually had it modded to use each amp board as a single channel amp, and like it - I have subsequently read that some don't necessarily think this is the way to go, but it works well for me.
I found that the biggest changes with the modded units, are the smoothness of the treble, the increase in bass control, all the while retaining the clarity of the stock unit.
Good luck,