Anyone got a 3500 Ram 6.4 Good or Bad?

In comparison, the two trucks are not the same. The 3500 gas has a total towing limit of 12,570 and the diesel is 17,400.(crew cab 4WD)Plus Different brakes and springs and Transmission, as the Cummins weighs in at about 1,350 Lbs alone,VS 500 Lbs(or less) for the 6.4. The biggest difference in safety is the Tow/Haul feature on the Cummins trans with multiple choices of Trailer weights, and the Exhaust brake. neither are available on a gas truck. Up thru 2012 Ram did not require any fuel additive, and I have found no difference in any of the Cummins not liking city use. They do like to be worked, though. and if you don't, the engine mileage will be less on average.
Like a Horse, they like to pull a lot of weight, and they do it very well. I had one Hemi truck in 2003
for a short time, and it was revving and shifting all the time,(easily getting under ten MPG all the time(towing) I traded it back just when there was a shortage of hemi trucks, and got back to a new 2003 Cummins. I travel a lot in the Mountains pulling a trailer, and crossing Raton Pass Colorado with a gas Truck would be no fun.IMO