Which tire has the highest Treadwear (UTQG) in size 285/65R18

It's time to buy new tires for my car, but I want to buy a tire that lasts longer than the original brand, OEM. Which tire has the highest Treadwear in this size 285/65R18?


640 - Treadwear

 Kumho Road Venture SAT KL61 - UTQG: 640AB - Tire Rating: 4.29


500 - Treadwear

 Kumho Road Venture AT KL78 - UTQG: 500AB - Tire Rating: 4.39