They are all excellent artists, but what they have in common, in my opinion, is that they are underrated...
Yes, this 'čadrsko' dialect is very specific; it comes from the Tolmin area, near the Italian border, and on the other side is Rezija, where they speak similarly.
However, a more challenging dialect is Čičarijsko, spoken in the Podgrad area and extending into Istria. My wife is from there, and when she talks to her mother, I can hardly understand anything...