Which tire has the highest Treadwear (UTQG) in size 205/35R18

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 205/35R18?

320 - Treadwear

 Accelera Alpha - UTQG: 320AA - Tire Rating: 4.11

200 - Treadwear

 Nankang NS-2 - UTQG: 200AA - Tire Rating: 4.5