Which tire has the highest Treadwear (UTQG) in size 165/65R15

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 165/65R15?

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500 - Treadwear

 Continental ProContact TX - UTQG: 500AA - Tire Rating: 0

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400 - Treadwear

 Kumho Solus KH17 - UTQG: 400AA - Tire Rating: 4.16

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