The base price of the trucks varied but I did not find any that charged differently for options when I was shopping. Even though I ordered mine, some dealers were charging more base than others before applying their discounts. I understand inventory already built may be priced differently based on build date, but never understood how the base varied on an order...
BTW: This is an easy way to see which inventory has been sitting around longer and which ones the dealer will be more willing to discount if you find what you want on the lots.