Generally speaking heavier cars ride better than lightweights. The greater mass is harder to deflect and so the movement is in the suspension, not the body. Obviously the damper can make a massive difference but it's easier to make a big, heavy car ride more smoothly. I say, ride not handle, the two things tend to be at odds.
What people tend to notice more is the thump and bang as shallow sidewall tyres encounter road imperfections.