Curve trajectories, properly adjusting speeds both in, and coming out of, sharper curves (only went through one so I probably shouldn't use plural words for this point but it's always struggled with that until now), better lane centering and virtually zero drifting or ping ponging, lane changes worked all the time, every time without issue.
It's hard to describe "how" it's better but I feel pretty confident it's substantially better just by the way the car drove and behaved...
Jeff