I'd much rather pull with a turbo engine. My brother has a 26' camper, a few years ago we used his Tundra 5.7 v8 to tow to Indy, the next year towed the same trailer to Indy, but with his new F150 with the bigger turbo v6. The turbo pulled much easier, less rpm and didn't sound like it was screaming out of the engine compartment like the tundra did. Fuel mileage was about the same, but the drive was just more relaxed.
I for one would rather have the 2.7 vs the 5.3 to tow, especially if towing into altitude, a naturally aspirated engine looses 3% of power every 1,000 ft of altitude, the turbo engine won't. That means a lot when climbing over 5,000+ ft.