That is lovely, do they record original material? only a few cover versions on YouTube, she has a really really wonderful voice, I hear more late 50s through a David Lynch filter vibe, actually Angel Olsen sprang to mind
If I could offer a tiny bit of constructive criticism I’d suggest she take care of all the vocal duties or duet with a baritone or bass range, something like Lhasa De Sela and Stuart Staples or Nancy Sinatra and Lee Hazlewood, as the dude she is singing with has a weak voice that is practically in the same register as hers and gives no contrast
I listened to them and I agree with you about their voices sounding too similar. Here is a link to some original songs for them.
https://soundcloud.com/search?q=magazine husband