Low trim level trucks are cheaper to own than high trim level trucks, but nobody seems to bat an eye at the guy who opts for more luxury features. But for some reason there seems to be a need to justify a diesel.
Bottom line is both would pull that camper, but the diesel will do it better. Cost is higher up front and maintenance is going to be a bit higher with the diesel, but you will save some on fuel and will have a more valuable truck when you are ready to trade or sell it. Financially both are expensive and poor investments. Buy the one you like better and move on down the road.
