Yeah there is a difference in a fifth wheel and a gooseneck. The difference is that a goose neck has a ball in the middle of the bed of your truck. The trailer has a goose neck shaped tong, if you will, that hitches to that ball. Where as a fifth wheel has a plate in the middle of the bed of the truck and the trailer has a pin that hitches to it. With a plate and pin it is really exactly the same concept as a Simi tractor-trailer. So if you see a ball in the middle of a truck bed that truck is set up for a goose neck. But if you see a plate resembling a Simi tractor hitch plate, that is a fifth wheeled configuration. Some trucks have a removable hitch plate and under that is a ball so you can do both. Some trucks have a hideaway ball, which folds down under the bed so you dont have a ball sticking up unless you need it for hauling a trailer. Be ware of the hideaway ball, I dont think they are really as strong as a solid mount to the frame.