aalden
22years old v new with also latest surface mount components, you have a hard choice, myself knowing a little of the topology of both my money would go on the Vidar.
Both should be able to drive your Thiel 1.5’s impedance load, as it’s basically benign 3-4ohm resistive.
https://www.stereophile.com/images/TCS15fig1.jpg
Cheers George