It is not all about payload there are other factors to consider as well. Someone previously mentioned torque and hp. Also to add the power is different. I can’t speak about the v8 diesels but my Cummins is at max torque at about 1500 rpm and stays there darn near all the way to redline. I am cruising along at 60 mph at about 1500 rpm. The gas engine max torque is going to be quite a bit farther up in the power band typically way higher than your cruising rpms and at least for me higher than I really want to run it for long. Along the lines of 4000 rpms While it can take it no way it can’t be accelerating wear compared to 1500rpms. Also the heavier truck will feel more stable towing. Next would be if you are that concerned about payload on a 3/4 ton jump to a 1 ton. On my 17 ram the 1 ton was literally $400 more than the 3/4 ton for identically optioned
