? much help will 3/4 ton make for ride quality comp to 1/2?

We went from a 150 to a 350 last year and for sure it is a stiffer ride 100% of the time. The 350 has a lot less movement when towing. Never had an issue with the 150 but we did have some sway and movement when trucks and buses passed. With the 350, not so much. Love the set up now. We use an equil-i-zer hitch.