I have a 2020 Power Wagon that I picked up in New Mexico, drove back to Northern California in May. Then drove it back to New Mexico in October for elk hunting, and back home. My buddy has a new RAM eco diesel that we took to New Mexico (3rd time for me) in November for on-range Oryx hunt.
I towed an open trailer with a small side by side for elk hunting, and got about 11-12mpg and maybe 500 off-road miles. His 1500 eco got 23.5mpg combined (no towing) with couple hundred miles of dirt road driving.
Comfort and enjoyability was great in both. Power Wagon is much better on rougher roads since it's softer suspension with 17in rims, whereas the 1500 still had stock 19in rims I believe with thinner sidewall tires. The sway bar disconnect on the Power Wagon is great on rough terrain but re-engages faster than 15mph which was annoying (but safe).
If you are mostly a highway/town driver, the 1500 eco is fantastic for gas mileage. It has no immediate get-up power from a stop compared to the Power Wagon, but that's not a big deal.
Both of our interiors are nearly identical in quality but I have the giant touch screen (his is a limited edition). Power Wagon can sit a 3rd person up front but 1500 has storage in the middle (cant sit there).
I went from a 4runner to my first truck in the Power Wagon and got it stuck 3 times already and used the factory warn winch. Got stuck in New Mexico in a deep sandy rut, got stuck in sand at Sand Mountain because I was towing a side by side and didn't air down enough and was on an incline, and got stuck in a snow ditch turning around. I never got my 4runner stuck so mostly it was just me not being used to a 3/4 ton truck and thought it would be nimble like my 4runner haha.
I have the RAM boxes and I absolutely love them. They are amazing especially for hunting stuff. Get them!
I would strongly recommend the 1500 eco or Power Wagon if you really want a 3/4 ton. Both vehicles are extremely solid, outstanding interiors, etc. These arent the RAMs of the 90s/2000s that rusted into a heap pile (I hope I'm correct).