Hard to say, but baring DFs/special race characteristics someone with CoC has higher potential then someone without. Since it’s the strongest haki, and leads to ACoC. Which the strongest PU a normal person can reach.
But if you look in this generation. Law with a God tier DF, look superior to 3 CoC users from his generation(Kid/Yamato/Zoro). So it’s not an exact science. But on average normal person with CoC> normal person without