Listen to the vocals as well...
Oh I perfectly know what you mean, even in the phrasing and how both of them drag out the end of 'I been tryin' to call my babyyyyyyyyy" Not saying there isn't similarity, just Stevie got his style from a lot of artists not primarily one man or one style. He totally took things in and made reference to them in his playing and his singing. And they became part of who he was as an artist.
Did he totallly get his style from Larry Davis? No. Did he flatter and pay homage to Larry Davis and then rightfully carry that influence into his style? Most Definitely.
Have you ever heard Stevie in a jazz setting? Oh my my my... HAIRS standing up as I type this.. Check out Bennie Wallace - Twilight Time. Long out of print, this album has Stevie at his very very very best, and nobody knows about it.
Might you have any examples of this? I'm having trouble visualizing/hearing what it would be like.
I'm trying to think, seems like maybe Denny Freeman or some of the other cats that were around when Stevie was coming up, you might find some of that if you can find some recordings of the bands that were around Dallas/Austin scene back then.
I first saw and heard this style at the Dallas guitar show in 91 I think, there was some Texas boys jamming and I was mesmerized by this sorta Texas two-step kinda shuffle and they were doing it on a strat, like I described, thumb and finger, alternating muting between notes, it was really cool but I don't know any direct reference to it that I could steer you at.
Ok Edit: Found this example of Jimmie Vaughan comping in this style, it's quite similar to Gatemouth, Albert Collins style of pulling the first finger off the string to play the note:
[ame="http://www.youtube.com/watch?v=RPG3DVfWcjE"]http://www.youtube.com/watch?v=RPG3DVfWcjE[/ame]
In this example, JLV does not use his thumb to dig into the bass strings and get that big E string "pop" Like Stevie did, but the guy I saw in Dallas combined that with this shuffle style to great effect..