A older '04 F350 srw with its smallish 6xxx rawr was never a good riding comparo to a F350 DRW with its big 9900 rawr....or any '17 one ton DRW truck.
Lots of DRW truck owners use the tire placard pressure which works good for 3k-4k hitch load however it can be a butz kicker when empty especially if one lives out like we do and have several miles of rough/bouncy county gravel or oil and chip roads to get to a state highway.
I keep my old '98 beater 3500 DRW chevy 4wd crew cab 454 with LT215/85-16 E rear
tires at 35 psi. It helps but still has a one ton DRW ride.
My neighbor has show horses (trainer) and has a '18 3500 DRW Ram and a Ford and Ram 250/2500 trucks. I sometimes ride along with him when he delivers or picks up a customers horse. He like some DRW truck owners brag how good it rides. Ain't so.
Now I made a living with these truck so those rides weren't new to me. I would say the newer gen DRW trucks ride easier than the older gen trucks I used in service. But their still a butz kicker compared to a 3/4 or one ton srw truck.
They are what they are and their rear suspension/4 tires are made for carrying heavier loads.