I feel like the Bravado and the Andromeda would have the coarser vocals you’re talking about rather than the smoother vocals you prefer. The Vantage’s are more natural in tone than both. Also, the Andromeda’s bass response will vary based on your source’s output impedance IIRC. Personally, through the AK70, I find its low-end calmer than all the other IEMs we’ve discussed.
As far as I’m aware, Empire Ears are planning a Vantage tour after the ESR/Bravado tour ends, so you can expect lots of impressions to come from that. Until then, you can check out my brief impressions of the Vantage here:
https://theheadphonelist.com/empire-ears-ep-x-launch-event-euphoria-audio-a-new-era/
Don’t forget the fact that electrostatic technology will soon make its way into other IEMs too in the form of Sonion’s electrostatic tweeter. Alclair, FitEar and AAW are gonna be the first out of the gate with it. Speaking of Alclair’s electrostatic hybrid (dubbed ‘Electro’), we’ll be seeing more of that in my stable soon...