Went from working with Mike Seeklander on extreme close quarters stuff for SG to working with Rob on similar material for TBD. Not huge differences, but definitely a difference in technique. I think it's good to show differences between instructors, because -- quell surprise! -- not everybody thinks the same way. I believe, as do the people I work regularly with, that there is no one "answer" to self-defense training needs (and if anyone tells you that they have such an answer, run away!).
I suppose it's like different schools or styles of martial arts...no one is necessarily better than the other. "Absorb what us useful" after all.