Which tire has the highest Treadwear (UTQG) in size 305/55R20

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 305/55R20?


600 - Treadwear

 Nitto Terra Grappler G2 All-Terrain Light Truck Radial Tire - UTQG: 600AB - Tire Rating: 0

 Nitto Dura Grappler Highway Terrain Light Truck Tire - UTQG: 600AB - Tire Rating: 0