The B&W is the way to go... I have one in my F-450, and love it.
And as far as I know... for a Ram, it is the ONLY way to go right now.
One of Dodge's "bright ideas" is that they did NOT follow the same 4-pin pattern as the Ford trucks, who began the design. That's good and bad. The good part is that it makes for a wider base, and thus able to have higher hitch ratings. (25K as opposed to the Ford's 20k) The bad part... unless Reese has began making them just this year, NO ONE ELSE makes a drop-in hitch for Ram except B&W. And they just began making base units for the Ram last year. Before then, you had to buy an adapter plate for a Ford-design hitch to sit into.
The B&W Campanion hitch design is a 2-piece matter. The 4-pin base that sits into the truck bed, and the fifth wheel hitch itself, which sits on top. A much nicer & more convenient design that makes taking the hitch in & out of the bed much easier. The head & base together weigh a ton... but removing them one at a time is pretty easy work. The 5th wheel head weighs 75, and is the same for both trucks. The Ram's wider base weighs 138 pounds, while the Ford base only weighs 78 pounds.
Here's the link to B&W's website for the Ram hitch Companion OEM - 5th Wheel Hitch - Fits Ram Puck System | B & W Trailer Hitches
Here's a great YouTube video explaining how it all works. It's an install video for trucks without the 4-pin system. This is what I had in my old F-250. Anyway, skip ahead to the 5:00 minute mark in the video to skip the base installation.