TAD Evolution 1 vs Thiel CS3.7

I have done some listening with the Thiel CS3.7 and I love the sound from that speaker. However, I am not able to purchase these speakers for about another year due to room issues. I am most likely going to pair the new speakers with a Bryston 7B-SST2 (or the 28B SST2)
While I impatiently wait to purchase I have become interested in the TAD speaker design’s since they seem similar to the Thiel. Specifically the $29,000 TAD Evolution 1, it is in the ball park of the $15,000 Thiel. There are some demo/used TAD for around $21,000.
I thought I would ask here if anyone has any opinions of the 2 speakers relative to each other. I have not heard the TAD yet and will do so in a few months’ time. I doubt I will be able to demo both speakers at the same location. I am sure the TAD is also a great speaker but do the materials used in it justify the 2X price? What are the differences between the 2 speakers from a technical perspective and also a sound perspective? I plan on sticking with my next speaker for a very long time so warranty and repairs are also a consideration.