I honestly think Floyd would win it in theory, but he would get robbed. it would be a boring fight and he would land more punches but those punches wouldnt be impressive, they would not hurt or jar Taylor and so the judges might not even count a lot of them as landing or telling punches. So i think Taylor would pull off probably a unworthy split decision just because he would be coming forward and trying to cut off the ring against Mayweather the whole time, but wouldnt be able to get the job done. Mayweather's footwork is too good and his hands are fast enough to nail JT coming in. So although I think he would deserve the win and get the job done, Floyd would get robbed because he ultimately would not be able to do enough damage or hurt Taylor bad enough to convincingly beat his ass. A lot like the first James Toney-Samuel Peter fight (but much much sharper and quicker).