No. Sulu is the one who never got anything to do or say besides "yes sir, Warp 5" and fighting in "Naked Time" before TUC whereas Mayweather got a scene in the pilot (the "sweet spot") and two Travis episodes. He probably got on average far more than twice the amount of Sulu's lines.
Not even remotely.
During TOS, we learned that Sulu was a fencer, that he was into classic literature, and had a bit of a sarcastic side to him.
What can be said about Mayweather other than he's rather bland?