What's the difference between the new 2011 F-350 DRW over the 2011 F-450 model?
The differences that count are the towing capacity and turning radius. (The F-450 pickup has a tighter turning radius than the F-350 Drw with the same cab and 4x4.)
Also, the F-450 pickup comes only as a CrewCab 4x4.
F-450 pickup CrewCab longbed 4x4 = 33,000 pounds, with a fifth-wheel "tow rating" of 24,400 pounds. So that means Ford estimates the truck with nothing but a skinny driver and 5er hitch would weigh only 8,600 pounds.
F-350 DRW pickup CrewCab 4x2= 29,000 pounds, with a fifth-wheel "tow rating" of 20,800 pounds. So that means Ford estimates the truck with nothing but a skinny driver and 5er hitch would weigh only 8,200 pounds.
The 4x4 accounts for about 300 pounds of that difference, so the remaining differences are about 100 pounds or less.
In a nutshell, the F-450 4x4 can tow a trailer that grosses about 3,600 pounds more than the max trailer weight of the F-350 DRW 4x2.
Is the 450 a better option to go with? We're looking at purchasing a 4x2.
Since 4x2 is not available in factory F-450 pickup, then you'll have to begin with a chassis cab and build it up the way you want it. A lot more options are available for the chassis cab, but it doesn't come in the King Ranch trim level. But you can choose regular cab, SuperCab, or CrewCab, and XL, XLT or Lariat trim, and the Lariat interior pkg is available if you'd like such luxuries as air conditioned seats.
As to the bed, the F-450 chassis cab doesn't come with any sort of bed from Ford, but Ford can arrange for it to be delivered to you with any aftermarket bed you want (and are willing to pay for) from a flatbed to a dually pickup bed to a hauler bed. Look at the sticky post about beds and tow bodies in the Towing and Hauling forum.