Need your help. May be somebody knows what will be changed in car behaviour if to use the same brand tires, but having different speed rating: H, V and W ? Suppose, you will never exceed 200 km/h. How will speed rating impact cornering, breaking, comfort, mileage and tire life ? Another question, is there a quality difference between tire bearing OEM spec (like MO for MB and N-spec for Porsche) and tire without it ? Thank you in advance for your posts.