>>126757411I don't hear this one as much. Byrne doesn't really do that added throat/mouth resonance thing an anon above describes. He has more of a yelping head voice thing, which I don't really associate with WIlliams.
I did some searching and there's even a word for the Vedder technique, "yarling". It's a constrained/nasal sound combined with chest voice and a bit of vocal fry, think of the Meatwad voice. Even Al Green kind of does this, but he could obviously sing.