They sell the Texas specials as being a bit "fatter" & more powerful than the standard Strat pickups but not so much that you can't still get clean tones with them. They just have a bit of an "edge".
I've got a Tonerider pure vintage set in my 80's MIJ Strat and they are much cleaner than the Texas Specials. (and sweeter than the ceramic pickups that came in it). I tend to use this guitar for early DS tones.