Buddy Guy? What a hacker. Ronnie Earl can out play BG with on finger. The original question was Clapton or Green. While Eric had a blues sound to his style, this is not true blues as anyone who studied the blues and plays the guitar knows. Green played more to the original blues masters. T-Bone Walker and players from his era were the blues masters that many guitarists learned from, even Stevie. Stevie brought the blues back to a new audience but even he copied many of has licks from the old blues masters. He was more fluid at playing the blues style then they were and much more exciting. I learned to play the guitar because of Duane and then looked at his roots to discover where he got his chops. He also had great tone and energy to his playing. I cried when he died.
Happy Listening.