Doesn't automatically mean Joes better though as there are lots of examples of people having a few lessons with someone then becoming better than them. Both are great and for every Surfing Alien, Extremist, Satch boogie you have a Building the church, Juice, Tender surrender and Badhorsie.

I could name a well know band over here whos bass player taught the lead singer/guitarist his first chords but know he tunes his bass. Paul Gilbert taught Buckethead but i know who i prefer.

Kirk hammett from Metallica is another that did some lessons with Joe on scales but he hasn't spent his whole guitaring life with him. (yes i know hes not in the same league but still)