I would have to concur with HarryIndiBlue. I have a similar setup, 16" R84s with 195/55R16 all-season run-flats and 15" R81 7 holes with 175/65R15 non-runflat all season tires. The difference in the ride is subtle. The major stiffness comes from the Sport Suspension Plus.
You sorta get used to it, that and looking for smoother roads to motor on.
Dry traction is definitely superior with the 195s. I'll let you know about the snow traction of the 175s tomorrow as we are expecting approx 6"s of snow today/tonight.
