I feel compelled to contribute to the thread. I know how difficult it can be to purchase headphones without the opportunity to listen to them. The Head-Fi community has helped me navigate this decision process before, so hopefully, I can help a little bit here. I currently own the Susvara, ZMF VC, and Stealth. I'm in the 15 day return period with the Stealth.
My disclaimer, I'm not a reviewer or experienced audio engineer. I'm just an old guy that likes music and is fortunate to have the resources to build a nice headphone rig (speakers are a non-started in this household). Since I'm not a reviewer or audio engineer and don't have their vocabulary, I will ramble a bit on what I like and don't like in the hope that you have heard some of the same gear and can determine how your preferences align with mine. I will end with my current impressions, but because the Stealth is so good at what it does, I plan on spending more listening time this weekend before I make the keep or return decision.
The Background Ramble
My preferences. My current rig is RME ADI-2 FS -> Flux FA10 (VOLOT on order, last stop before I resort to using speaker taps with the Susvara) -> Susvara, ZMF VC, Stealth (all balanced). My portable rig is Lotoo Paw S1 -> Thieaudio Clairvoyance. With the Susvara and Clairvoyance, I'm listening to some of the best music I've ever heard. My first love was the Ayre QB-9 -> Eddie Current Balancing Act - LCD-2 (original). My last love was the Ayre QB-9 DSD -> Simaudio 430ha -> Hifiman HE1000 (version 1). In the past, I found my preferences aligned with Tyll at Innerfidelity, so I bought what he liked. Between my last love and current setup, I took a break from the hobby. When I returned, Tyll was gone, and I was on my own. I discovered the Harmon Curve with Bass Shelf was my tonality preference. I prefer warmer versus brighter.
Know for what I don't like. The HD800's were too bright, and I returned them twice. The HD800S stayed a little longer, but I kicked it out too. Returning to the hobby, I felt I was missing something with the HE1000v1. I moved to the HE1000SE, but they had a little bright edge that bothered me. It was hard to return them because they were almost there, but moving to the Susvara, I hit my "just right" spot. I'm also very sensitive to resonance. My ears were picking something up with the Stellia, and I returned them after a weekend. Dan's Ether C's also didn't agree with me. If I remember right, they were too bright for me too. I've run through a lot of gear and can go on, but hopefully, this is enough for you to get a feel for my preferences.
The music I listen to; a lot of Classic Rock, Blues, and Funk. I guess everything but Country and Western.
Finally, what I think about the Stealth headphones, at $4,000 with all its new technology, I was hoping for a closed Susvara or something better, and to my ears - it's not. To my Son's younger ears, who liked the HD800, the difference is smaller. He also likes the Susvara better, but he would keep the Stealth too. I think the difference is the bass presentation which confuses the hell out of me considering the frequency curve. But like I said, I'm not an audio engineer or reviewer, so I can't explain what I'm hearing. I want more physicality in my music (if that's a thing). Maybe it's because the Stealth is so clean. My ears do not hear any distortion or resonance. You can crank these headphones, and they don't break up. And DCA clearly nailed Harman Curve with the Stealth.
So how does it compare to the ZMF Verite Closed? To my ears, it doesn't. It's different. If you love your ZMF VCs, I'm not sure you would want to replace them with the Stealth. You might want to add the Stealth to your collection. But before you do that, I would suggest listening to the HE1000se, and although I haven't heard the HE1000v2, I would give them a try too. Unfortunately, neither headphone is closed. On the other hand, if you hate your ZMF VCs, the Stealth may be what you're looking for.
For me, if making my imaginary closed Susvara is beyond the industry's engineering know-how, I would opt for Zack making a Verite Closed that hugs the Harman curve or Dan making a version of the Stealth with that "physicality thing" I can't explain.
I'm sorry for the long post, but hopefully, it helps someone make a $4,000 decision.