Goose Vs 5th..long post
The 5th wheel is primarily aimed at the RV trailer. I believe it provides for a cheaper made trailer with less reinforcement required above the hitch on the trailer. This allows the living compartment to be closer to the hitch. (bigger living area) Gooseneck hitches are higher rated because they are lower in the bed of the truck and can get a very strong hitch down low on the frame of the truck. The gooseneck trailer "neck" takes all the moment and bending load, not the truck hitch. Consequently, the gooseneck trailer uses the same size I beam as the main runners up on the neck to handle the forces of an extended hitch. If the same size (8" ,10", or 12" ) beams were used in a camper over the hitch, living space would be wasted. I believe the gooseneck hitch and ball is the better design from the standpoint of taking load. So, on a goosneck design, the trailer takes a big moment and bending load, and on a 5th wheel, the truck hitch takes more of it. Make sense??
As a side bar, a semi 5th wheel is very wide and does not flex or pivot side to side as some RV 5th wheels do. This is to provide 4 point or 4 corner suspension for the trailer. To the degree that an over turning trailer will take the truck with it. The RV hitches do not supply this kind of overturning resistance. They are too narrow side to side. In fact many RV 5th wheels pivot side to side for the convience of allowing hooking on uneven ground. 5th wheel RV hitches share little with semi 5th wheel hitches.
Both hitches are easy to hook up if you can see them. The 5th wheel is easier if you can't see the hitch. If your bed is empty you can see the gooseneck ball from the driver's seat.
Also, in my opinion, since the ball is lower in the bed on a gooseneck, the ride will be a little better, as front to back pitching forces from the trailer will tend to force the truck more front to back instead of inducing an up and down motion on the front axle.
All of this aside, If you follow the industry standard of gooseneck for utility trailers, and 5th wheel for RV, then your resale later will be quicker. Just some thoughts...
Doug Rees