the 7.3 is much much lighter than the 6.7.
A 250 with a carli pintop kit, carli swaybar and carli full leaf packs can do just about everything that a stock raptor can do, sans jumping.
It drives like a much much larger truck. It drives like it is far heavier.
My raptor feels like a ferrari 458 compared to my super duty.
The f-250, even with the tremor package, has a significantly harsher ride than a raptor or a standard F-150. ( stock for stock).
As far as cruising at 85 with a solid axle, one finger on the wheel. like piloting a couch with 37s and a diesel motor. ( with the carli suuspension )
Also- building a superduty is hilariously inexpensive when compared to building out a raptor like I have.
I think I'm probably 10-12K into my f250 (beyond the purchase price.)
I'm more than 12K into the lights and aftermarket switches on my raptor. 
