Soundgarden! Because I don't listen to Audioslave . . . so it is really an easy question to answer and takes absolutely no critical thinking.
I tried just typing in Soundgarden, but HP's refused to allow the answer because it was too short, so now I get to share some inane dribble with you on why Soundgarden is the better band.
However because I have never listened to Audioslave, then the answer can only be Soundgarden, Soundgarden, Soundgarden!
Hope this cleared things up for you . . .
. . . however since neither guitar player even made my top twenty list I felt this would be the perfect opportunity for you to read and listen to twenty AWESOME guitar players https://hubpages.com/entertainment/My-Top-Twenty-F...