If you're going to buy a HD Truck and just beat the crap out of it, the 6.0L is a reasonable choice. Buy it, beat it, burn it. Strong motor (if something of a boat anchor), built tough, easy to work on, 50 year old technology... IOW, typical Chevy.
But if you want something that will be a 90% family truck, grocery-getter and part time
Mule, the F-150 with the Coyote V8 has more HP, more torque and is about 50 years ahead of the Chevy technology wise. I get a legitimate 23MPG on the HWY, unloaded and driving for MPG. If I'm in NASCAR Mode (mostly) I only get about 21. Maybe 20 MPG.
In the SuperCrew configuration, it has 385 HP (25 more than the Chevy 6.0) and 387 lb-feet of torque (7 more than the Chevy) However, I'm sure that the Chevy gets more torque at a lower RPM, making it more user-friendly for towing. Haven't looked at Dyno Chart for the torque curve.
But the Coyote V8 ain't chopped liver, either.
PLUS, you can get all that WITHOUT the expense of the Max Tow Package, which also lowers passenger comfort somewhat. And you don't have to worry about the new tech of the EcoBoost.
Right here, http://www.ford.com/resources/ford/g...0_r1_Jan12.pdf
rated to pull 10,100lbs with a 3:55 rear axle (more than that just simply sucks)..... Which is almost certainly a low-ball estimate.
If you think you're going to move up to a BIG Unit some day, go for the HD Truck but get the Isuzu Diesel.
If you're stuck on Brand Loyalty, good luck
If you get the Light Duty Truck, you'll want to put some Air Bags or SuperSprings on it and a sway bar. Minor cost. Even most of your HD Trucks lack a sway bar