It's impossible to get the same fighter who fights like floyd that's why he is unique. however, mosely will be a good sparring partner not because he can mimic floyd seamlessly, but because he is the closest to mayweather "speed wise", remember that he isn't hitting oscar with powershots in their sparring sessions, so without so much power in the delivery of his punches in his mind, he can crank up more speed with every punches. The rest will be up to oscar since the reflex and impeccable timing setup punches of mayweather is impossible to mimic.