Just becuase the treadwear rating is higher doesn't equate in any way w/"better". Maybe better for you cause they last longer, but not better grip and feel etc. The Diamaris is a summer sport tire designed for max grip, even breakaway and good ride etc, not neccessarily longest life, just not a priority. With that said, I rarely go with OEM cause in most cases there are better choices, but the Diamaris is an exception as it is a very very good tire by any standards. If you don't need the maximim grip perhaps the Latitude by Michelin is a good compromise, 420 treadwear (twice that of the Diamaris) rating and all season etc. Just don't expect the same super high grip in the dry. Just my 2 cents.