The 6.0 is far from being completely fixed. In fact Ford is scrapping the 6.0 and going to a new 6.4 engine twin turbo. The biggest issues right now are the injectors, head bolts and puking coolant. If you use the pickup like a car and don't pull much the motor will hold up. But if you are going to be doing heavy towing they are having problems with the heads and injectors. I have had problems with three trucks now. The latest one Ford is now trying to blame my fuel for the problem and denying warranty. Big mess but anyway I went to a Dodge.
Now as far as the dodge the ford has nothing on this new one towing at all. EXCEPT the transmission on the Ford is hands down much much nicer. You don't have the engine braking with the Dodge and it's only a 4 speed where the Ford is a 5 speed. Motor wise it's quieter than the Ford and the engine compartment is very clean. On the Ford it's a mess and VERY hard to work on. Sheet metal goes to Ford. The Dodge is very soft in the metal where the Ford is much thicker. I would give the ride, steering, and braking to the Dodge. I do like the Ford frame better. I'm not a big fan of hydroformed tubular frames. In fact on the Dodge they are not rated for campers and also they are not rated to put heavy utility boxes on. There have been several frame issues with the utility boxes. I'm a little concerned because we haul some very heavy loads.
Overall I like the Dodge. I will stay away from Ford for awhile and maybe for a long time. The 6.0 is not bulletproof. The cummins is. As far as overhaul though we always have gotten at least 500k before an overhaul on the Fords, 7.3's anyway. Haven't been able to keep a 6.0 going long enough to get alot of miles on it. Dodge always goes that or more. The key on either one is maintenance. Fuel, air, and oil filters. Oil every 4-5k depending on conditions, air every 10-15k depending on conditions and fuel every other oil change. I know it exceeds mfg. recommendations but trust me you want to keep the contaminants out.
If you're hauling heavy though I wouldn't buy the Ford. Way too many problems.