Aside from different dna, different training, different intellect, safer focus, tighter style plays the hand he was dealt and collected closer to his chest,measured in for long haul.

Roy was about risk n reward, probably a freer training regime , footloose fancy free, relaxed attitude so the body follows as did the relaxed guard and shoulders allowing him to get in his own zone faster,shoot from the hip,hitting during moves for more speed and percussion, more risks, more damage given and undertaken, risked his whole hand while playing them face up.

I love watching one and appreciate the other with reverence.