I recollect from reading Hendrix books that he preferred Gibson/humbuckers when he played blues songs. Of course there are exceptions, Hear My Train A Comin' I've seen with Strat, but when he played Red House, he used his V, and there are photos of him playing a Les Paul upside down (also had a white SG/Les Paul double cutaway, I've seen a Swedish tv performance he used that, I believe during Red House).
Just an observation, there certainly are incredible "Strat Blues" all about. Hell, Machine Gun, Band of Gypsys album is certainly blues, still by far IMHO his most incredible performance, his tone that night was perfection (gotta love tube amp/gain variability...not!), he tapped into something as deep as the center of the Earth for that 12 minutes or so.
MJ