Here is a fairly informative artical on brake pads. For trucks, ceramic or semi metallic are the only two realistic choices. Out of those 2, the cheaper semi metallic is fine and is the most common. The use of the coach is a big factor for example, if you plan to be traveling around the country on a regular basis towing a vehicle and running through the mountains, ceramic may offer some advantages.
https://www.autorepairboulder.com/different-brake-pads/