Sorry but I gotta expand on the original question a little bit if I may... Why would it ever matter? You would NEVER want to mix servos of different manufacturers or even different models from the SAME manufacturer on the same control surface so why does it really matter?
I really don't "get" the question. Can you give us some context here? I'm sure we could regirgitate to you what turns clockwise by default and what turns counter-clockwise by default but the smart thing to do is to first discourage you from doing something you should never do regardless of servo direction.
