I experienced something similar to what you describe when I replaced the factory Bridgestones with Michelin PS 4 a couple of months ago. I have 17x7 Team Dynamics wheels and the Michelins are the stock size for our cars. The turn in is not pin sharp like the Bridgestones, but the grip is certainly improved. I found the ride to be somewhat less firm as well. Overall, I’m pleased with the Michelins.