Which To Choose...Devore Fidelity O/93 vs Zu Soul Supreme ?

What amp are you using?  I've had 93's and Soul Superflys side by side in my home.

O/93: easy to drive, amp friendly, very refined textured midrange, huge soundstage, deep (but loose) bass, needs a bit of space around it, laid back sound

Supreme (based on owning Superfly/Druids): easy to place in room, great focus/tonal density, very tight/resolving bass that also goes deep, pickier about amps than DeVore, half the cost of O/93, forward sound

Oh, one more thing.  The answer is order the Supremes and take advantage of Zu's 60 day trial.  If you don't like them, send them back and get the DeVores.  Easy peasy.

My amp is a Pass Labs XA-25.

Herb Reichert loves the DeVore O93/XA25 combo.

Where are you located?
I own the O/93's. 
Whoopycat pretty much nailed it. I would add that over time, there is a slight glitch in the upper midrange. Rightly or wrongly, I attribute it to the two way design without a dedicated midrange. At times this glitch would not make it itself apparent unless I really tried to listen for it, which is no way to enjoy music. At other times, it was readlily apparent. 
They don't do the imaging thing. 
They are very sensitive to speaker cabling. I tried an assortment of better speaker cables and heard clear differences with each. If you buy O/93's, you really want to buy Auditorium 23 speaker cables. 
All that said, I don't regret buying them a bit. I love them.