For one thing, he tends to bend notes more than the others did. I think his uniqueness, though, isn't his technique, so much as his musicianship. Like the others listed here, he is unique as a musician. This would have shown if he grew up with a saxophone in his hands, I'd think.
Another "trick" of Tal's is the harmonic playing he does. Listen to 1969 THE RETURN OF TAL FARLOW for some serious showcasing.