Whitaker had solid power to the body. He put a few guys down with body punches. Rafael Pinada was one of them. Overall though Floyd has the edge.
Don’t shoot the messenger but I assure you he hits like a truck when he’s trying to / can or is healthy enough to, I don’t jive with Mayweather but it’s a fact in my canon.
Neither of these men were huge punchers. But, Floyd went 10 years without a KO. And, he never had a one punch KO like the Whitaker-Nazario one.