URGENT question, converta ball vs companion

[farmer24]

I just purchased my first fifth wheel, high country 333DB. Anyway stopped by the dealer to settle up on it the other day and they had put a converta ball hitch on it. I have a fifth wheel already in my truck as I am a farmer and pull gooseneck trailer such as flatbeds. I have the B&W flip over ball in my dodge truck. Anyway I kind of wanted the companion B&W hitch that just fits in to the one I already have permenant in the truck as I dont want slide rails as I need to use the truck on a daily basis. The dealer had installed a converta ball type hitch on the montana fifth wheel that basiscally is a just like a gooseneck. I hooks to my ball in my bed just like the flatbed trailers I have. (I figure this is a cheaper option for the dealer rather than giving me the companion hitch) Any way I want to know what I am sacrificing if any by hitching my montana to the ball in my truck just like a farm trailer rather than have the companion hitch? Also I am not planning on pulling long distances just within 200 miles from home to the area lakes ect. Thanks I hope this makes sense and I need help fast as I have to pick the camper up next week.