Pep. He was so much more smooth and blended his offense and defense together into a more appealing way. He made guys miss but was in range to immediately counter. Just a more complete fighter.
I'm not sure i've ever seen footwork as good/amazing as Pep's. No wasted movement, no bouncing, he just glides around that ring. Different but better than an Ali or SRL. So much moving but so economical. Of the more recent boxers Hopkins was a marvel, but in a very different way to Pep.