Other are 3 basic diff types. Open has zero resistance and allows all power to go to one wheel if it's spinning.
Limited slip has friction packs that attempt to equalize power between both wheels. It works good but under hjigh load/stress only one wheel will spin. Posi traction sends equal power to both wheel pretty much all the time regardless. It still allows a slight diff in wheel speed so you can corner.
For most cars unless in the snow belt an open diff is fine. If you get stuck it sucks because only one wheel will ever spin. In the snow belt, limited slip will suffice most of the time. Posi traction is the gold crown diff option.