Kelu, the overall rating is just that. It is a combination of the other columns in the tables... dry & wet braking, handling, road noise, comfort, tread wear, etc. Each multiplied by a fudge factor, that only CR knows, to get the final score. Your overall scores might well be different based on what floats your particular boat. (I believe that CR is staffed by fuddy-duddies with pocket protectors and horn-rimmed glasses, so read everything they do with that in mind

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If you want tires that are good at some particular parameter(s), you need to just look in those columns in the table. That's why (for instance) the Nitto has the best dry handling in the All-season category, but is middle of the pack overall.