I've got a B&W I installed myself and lifted all the pieces. I just put the companion hitch in again for my annual trek down south so it's fresh in my mind. There are 3 pieces to the B&W, the part that mounts to the frame, the fifth wheel companion base and the head of the hitch that sits on the base. Based on how the weight of the pieces compare to 50 pound bags of salt that I carry into my basement for the water softener, I would say each piece weighs about 50 pounds or less since I can handle them easily.
So, after this long winded explanation, in my opinion the B&W total weight on your truck is about 150 pounds or so, certainly not much more. I don't think it will be as high as 200 pounds.
If you are just using the gooseneck and not the companion fifth wheel hitch I would guess the weight to be about 60 pounds.