Originally Posted by FJ60
Just replaced a set of F1 GS-D3s with Super Sports. Can't comment on ultimate grip 'cause I don't push my wagon hard. The Michelins are less jarring over expansion joints or rough roads, but the Goodyears were close to 5 years old when they were replaced so perhaps age is the reason behind the comfort difference.
Age is going to be a major factor there in your observation. My ride became much softer and quieter when I replaced worn Pirelli PZero Nero A/S tires with the same new tires.