You have to get the version where he does the vocals too. Its some live performance and it is completely flawless.
The thing with Vaughan with me is I believe the guitar was an actual extension of him. Not his ego or well practiced fretboard exercises or sound gimicks, just raw guitar from deep within his soul. Sure he only played the blues but sometimes he would just get going on stuff and it was so amazing what would come out of him and where it would go. His improv was also very groove oriented. No steady flurry of solid 16th notes, every note had expression and a purpose, not just notes played to meet some shred specification.
Hes not just my favorite guitar player, I honestly believe, without bias, because I like so many of the great guitar players, I believe he was the guitar, heart and soul.
As nice as Steve Vais version of Little Wing is if you listen to it back to back with Vaughan you quickly realize hes not even close to being in the same league, Vai is thinking about it, Vai is planing and grabing into his bag of well rehearsed tricks, Vaughan is just totally connected, eyes closed, and the music just flows, one with the guitar.