Decisions....Gas or Diesel

My neighbor had a 7.3 Ford and had never owned a Dodge. He bought a 2019 Ram 2500 with 6.4 Hemi and loves it. He pulled some big boats from the boat show and was very impressed plus lots better mileage and gas is about 50 cents a gallon cheaper.
For the price difference I would have to go with the 6.4.