The lighter you go, the faster they get.

Roy had way faster hands than Joe. Meldrick Taylor and Hector Camacho Sr (before he was ruined by Edwin Rosario) were both faster. Ray Leonard had unbelievably fast hands when he was coming up through the welterweight ranks after the Olympics. Hell, I remember Ricardo Lopez as having incredibly fast hands and reaction time in his prime, and Roy was about as fast.

The 1-2 that Roy dropped Reggie Johnson with was one of the fastest two-punch combinations I have ever seen. Roy was way faster than Joe, but Roy was not as fast as prime Meldrick Taylor.

The only person who I can think of as being definitely faster than Taylor was Eddie Cook. He was fighting Israel Contreras for the WBA bantamweight title and his hands were so fast I almost couldn't see them land. The guy was unbelievable.