They really are not all that special when you see them in person. The paint is a ford knockoff as mentioned above and the interior is blah IMHO. Go see one at your local dealer and you probably wouldn't want the "Resistol" edition if you were in the market for a dually short box.
EDIT: I've got to say, I'm not a fan of those "half fenders" on the dually trucks, so that doesn't help the "Resistol's" case in my books.