Good to see you around here again, Dan.. it's been a minute or two.
I'm not going to be especially helpful with this post, but here goes anyway. With four of my own, and having played another dozen or so Alembics, I have yet to play two of them that sounded alike
in more than a general way. I've played two Series I basses that were twenty-some serial numbers apart, that were darn close, but I could still tell them apart after only a few minutes in-hand. These were incredibly responsive instruments, and most definitely had that commonality, yet different. A more stark contrast is heard in my two Distillates, made within a couple years of each other, having basically identical circuitry, neck layup, and scale length are completely different. It's not a good/bad or better/worse thing... it's simply that each has its own unique voice.
If at all possible, go play the Orion. I bet initially you're going to miss the filter-driven tone circuit of your Spoiler 5, but you will still hear that piano-like clarity in the Orion. As Jazzy posted, you can always add a Filter and Q-switch later, essentially making it an East-Meets-West option like my Custom fretless. (though it is a bit of a squeeze to fit it in there) That, for me at least, is truly the best of both worlds.
Good luck and happy hunting... report back what you discover.