No, it won't be the same, but it will be close enough. And the aforementioned problems will not be present, so I'll be happier. And the Nomad has "the look," and is tiny, so it'll still get attention, when it makes a BIG sound.
On another note, are you sure the sound comes from the strings alone or does it come from the piezo, fretless, AND the strings? It certainly doesn't come from wood or the acoustic nature of the body. And if I can get 80% there with roundwounds on a micro-scale ABG with piezo and a multiFX unit, what does that mean?
I'm not knocking the Ashbory, at all. I love it! That's why I'm trying to solve the problems I had with it, because honestly, if those problems hadn't existed, I would still have it and would NOT have the short scale basses that I currently use. I never had a problem with the balance. I love the way it looked. The sound was magnificent and ideal. I just couldn't play it in a band setting, so it fell by the wayside. Like I said the tuning instability--even after a year--and the 18" scale made it so difficult to play. I could make one with a longer scale and use different strings, but that's kinda what I'm proposing here anyway. And I would argue that if we played my proposed "Nashbory (Nomad + Ashbory)," next to an Ashbory with polyurethane strings, which are more thuddy, that the difference would be even less.
I just want it to be as close as possible.