Hi Rob,
I have not seen any of Al's so I cannot comment on those.
Between Windy's and Bob hunt's, there is a definite difference. Windy's are like home movies done well. A lot of talking and explaining with other stuff thrown in too. All in all a lot of information is passed on.
Bob's have been more production style. Like a TV series. A lot of info and great presentations.
Bob has not produced as many as Windy, but you have to ride along a while with Windy to get there. Either ones will give you a lot of info, just a matter of preference.