Where are the guys who were saying that Mayweather is better than Pac because Mayweather had a convincing win against Marquez (@146 lbs overweight) while Pac had a draw with him (@130)?

Now that Pac is fighting Marquez at the same weight Mayweather fought him, I hear too many excuses about how it will be a mismatch. At least, be consistent. Is it because you are afraid that Pac dominates Marquez more than what Mayweather did?