Re: Roy Jones vs. Harry Greb @ MW.
Jones threw with an explosion of speed and power. In terms of punching speed and form, Jones is clearly superior. I don't need film to make this assessment. Greb by all accounts was more of a windmill. Happily trading away technique and power for speed & activity. Not trying to dumb it down too much as there clearly is a science to Greb's approach. He was successful for a reason, after all.
What's the point, though? Jones speed is more dangerous and lethal. I don't doubt Greb could flurry faster. But if you had to get hit by either man's flurry... we know the answer to that question.