I don't claim to know much about the different hitch options. However, many frame manufacturers will void the frame warranty if you use a gooseneck hitch with a 5th wheel trailer. Again, I don't know the GenY.
I have both a 5th wheel camper and Gooseneck horse trailer. I use the ball for the gooseneck and have a B&W companion for the 5th wheel. Easy to convert one to the other, just move the base out of the hole for the ball.
Using the B&W with the kingpin, is much easier to hook up than trying to align the ball. Connected, it is a solid connection, rides correctly and no modifications to the trailer. When not using the 5th wheel I either move the base forward or take it out of the truck if not going back and forth between trailers.
The reason horse trailers use a gooseneck hitch is because the frame is built differently than a 5th wheel, the trailer pulls from a different force vs the 5th wheel is centered higher on the 5th wheel pin.