(I'm new, please let me know if my addition is in appropriate) Just adding for a comparison. Not the 6.4(gas) BUT I have 2017 Laramie,4x4, 2500 crew, long bed, 6.7 DIESEL ,6spd trans. with the middle differential ( I don't remember the number at this time.) 17" stock tires. I bought for towing. I keep a topper on and tools, plus, most always have some load, as it handles better with weight. ( Less traction loss). In Alaska. At 7yrs old, I get 21 hwy. 18city, no less than 14 towing. Usually top speed through mountains. I don't loose power even on steep inclines, just more fuel. The only issue I've had is when battery gets weak it had computer glitches, like, lights dimming in cab, seat heat settings wouldn't turn off. Or radio won't work without restart. Odd. So after a year of that. It just wouldn't start one morning. No click. Changed the 7yr. old dual batteries, works great again. I have not done the new recall on emissions. No trust. ( If you're going to be towing alot, or heavy, I do recommend the diesel. But have no knowledge of the newer models. Good luck with your choice.