Good news, if you're terrified of change: One of the few things on the 2011 Ford Super Duty that hasn't significantly changed is the chassis. The frame, suspension, brakes, and most of the steering components are largely carried over. That's not to say they haven't been tweaked to make them better than the last generation.
It might seem counterintuitive in the heavy market to leave a frame alone, but the thing was already a unit able to tow and haul more than most humans have a need for. There are some very noteworthy additions, though. Probably the most important for buyers in the segment is the option of a factory installed goose-neck hitch substructure mounted under the bed and a towing plug mounted to the bed wall.
Other tweaks include changes to leaf springs and front spring rate, new valving in the shock absorbers, a slightly adjusted steering gear and steering geometry.
All told, this body-on-frame beast, when optioned to F-450 level, has a combined max gross weight rating of 33,000 lbs. So, go tow a house or something.