The splint I'm using is made for people without disc, surgically damaged joints, rheumatoid or other types of arthritis. It's name decribes it's function. It's a Passive Posterior Muscle Repositional Splint.
I'm not familiar with the other types, other than what I've read on the board.
GenDen, I believe uses one type of splint for daytime and a bionater at night. (I think)
There are several members who have used and are using Anterior Repositional Designs, and others have mentioned bionators.
I'm sorry, I don't know anything about these other types. You could do a search on the board and use keywords "Anterior Repositional" and "Bionator" and bring up the threads where these have been discussed or post a new topic and ask what kind each person is using and what their results have been.