Thosb - Since you haven't gotten a response to your Dunlavy / Thiel query, I'll throw in some observations. I have not directly compared the two brands, but I do have some experience with Dunlavy which might be relevant. In my consulting work after Thiel Audio, Dunlavy was among my contacts, where I saw first-hand how they approached the work. I would call John's approach nearly identical to Jim's, with Dunlavy having more investment in equipment, patents and broader background in the art.
The company started as Duntech in Australia where John D. worked in the high-energy antenna realm, holding multiple patents - that company had considerable government support as they piggy-backed the loudspeakers into the antenna infrastructure and contracts. They moved to Colorado Springs as a private enterprise for more direct access to the North American market, with the financial backing of John's patent attorney as partner. Their facility was enviable - including two anechoic chanbers and considerable interactive production measurement / analysis tools. Every speaker was developed and tested with multiple / near, mid and far-field mic arrays. Their crossover layouts concentrated on stray electromagnetic interactions. They were net first order, like Jim's with similar attention applied to similar methods and outcomes.
Another departure was their cabinets, which is why I was there. They allowed vibrating panels (like British monitors), incorporating those resonances into the sound sculpture, and ignoring the resulting time-domain slurring. Similarly, the square edges introduced diffraction, which seemed of little concern to them. However, I see that more recent models paid considerably more attention to those aspects which I had assessed as weaknesses.
I note in the reviews, that John Dunlavy (a rather commanding presence) pushed back very effectively against the misleading close-miked measurements by Stereophile. Thiel took a "gentleman's attitude" and rarely if ever commented publicly on the misrepresentations of such measurements.
Dunlavy aimed for higher retail prices against lower manufacturing costs than Thiel for a solid profitability, and thoroughly well executed designs. Dunlavy seemed a one-man-show on my visits, much like Thiel. The ability to carry on without the founder's focusing vision and unique talents is very difficult. There are only a few products beyond Thiel which interest me and which I recommend when asked. Dunlavy is one of them.