I had a 2014 3500 with a 68RFE with 342 pulling 14000 5th wheel . Now have a 2020 Long horn with the HD with the Aisin ,Factory air and more stuff than I care to mention . My opinion is that my new truck does a better job of towing than the old one did .Is it worth the difference in money ? My opinion is yes . it's your decision to make.
DRW? What gearing?