I have both and use the shorter one offroad and the longer one to tow/haul stuff. I can still haul in the short bed truck. It is a 2500 Dodge Quad cab.
The handiest thing I have in both trucks is the flip over bed extender. It is used more often to keep item secure towards the back of the truck (to keep from sliding forward) than it is to lengthen the bed. I thought they were a gimmick until my grand dad gave me his because he didn't haul hardly anything in his truck. Must be a generational thing.
