We started out with the B&W TurnoverBall but after installing learned that the B&W Companion 5th Wheel Hitch was not compatible with either the Tundra version of the TurnoverBall or with the factory installed pin box on the camper, the Reese Revolution.
So after that decided on the Reese 16k 5th wheel hitch and above bed rails. The look isn't as smooth as the TurnoverBall would have been but it was a compromise.
Our dealer had to weld a galvanized patch in my bed and cover it with spray bed liner to fix the hole from the TurnoverBall.
Again not super happy with all that but the camper experience helped make up for those frustrations.