Well the first pull with the truck is in the books. Jury is still out on air bags - not sure it really needs it any more. We did not feel the ride was any different from the Ford with the air bags. The ride was ok, with only bridge expansion joints a noticeable difference. Not sure if the difference is due to the air bags (ford) or the dodge being a 4x2 not a 4x4....
As a comparison to the 2002 F350:
Feel of Power: Not any real differences. The 7.3 had plenty of power including being able to increase speed even on steep hills at highway speeds. The Dodge just has power to spare as the 7.3 did. I did not really detect any significant differences here.
MPG: Again no real difference - we traveled the same 150 miles we travel twice a year for the last 6 years and have pulled in at 11-11.5 MPG with the ford and the dodge got the same at 11 mpg. This was pulling at 62ish, nice weather, no AC, and camper fully loaded with water, 2 generators, 55 gallon tank of water in bed of truck.
Noise: Here is where there was some difference. Both trucks really just purred along the highway with minimal noise. The ford had more highway noise in general but not much of a difference in engine noise. When asking for more power the ford would literally roar to life and in heavy pull it would be hard to carry on a conversation as the engine noise was loud. The same route and the Dodge the purr of the engine really was only a slightly louder purr when power was demanded from it.
Braking: No comparison - the Exhaust brake is amazing!
Overall the dodge is newer with many fewer miles so it is quitter than the ford was and well worth the upgrade.