Mayweather is faster. That's obvious. His speed is amazing. Pacquiao is fast. But he's been made to look even faster than he really is cuz of all the slow fighters he's been facing. Clottey. Hatton. Old De La Hoya. Compared to them Pacquiao seems to be operating at warp speed. Mayweather speed was proven when he faced another fast fighter in Mosley.