I've just got Tommy E's fantastic Solo Guitar book which I'd recommend to anybody as one of the best instructional books I've ever come across - his version of Windy and Warm is slightly different again. It's a bit more percussive and the 'A' section has a great (to my ears anyway) jazzy progression which fun to learn and play.
I suppose the definitive version is the one you like best, and the one that best encapsulates the essence of the piece, at any given time. I like 'em all
