Sierra 2500 fifth wheel hitch - factory prep vs aftermarket

10 years ago when we first started with a 5er I went with a B&W turnball install and a Companion 5th wheel hitch. When the hitch removed I have a smooth bed.
When I upgraded truck and 5er I couldn't find a truck that had the factory installed puck system and met the other requirements we wanted. Found one that met everything but so had a B&W turnball install.
You didn't mention the year of your friends truck but I believe a dealer can install the factory puck system on years that they were available in.