There are only a few electric uprights that sound roughly like a real acoustic upright when amplified. The Eminence is one. I've heard recordings of Messenger's that sound close. I think there are a couple of others that have small acoustic chambers, like the Eminence, that also might come close when amplified. None of them sound much like an upright unamplified, AFAIK
. I have the fretless Omni and I think it sounds pretty good when bowed, but more like a fretless guitar than an upright when plucked. Regardless, the Omni is in a space all of its own so neither guitarists nor upright players take to it without a few hours exploration.
I have an Eminence and no one I've played with has ever complained about its tone, but to my ear, it has too much midrange and lacks depth. Fine for a jam but I, personally, would never record with it. I'm sure others probably would without complaint.