There are too many ways to looks at this... Manny only recieved #1 because Floyd 'retired'. Floyd comes back and beats the man Manny went life and death with... But Marquez was a blow up featherweight. Manny has beaten fighters Floyd beat in more convincing fashion... After Floyd already beat them ( depending on what you would call a more convincing fashion)... Thay have polar opposite styles... and so on and so forth.

For me personally I would put ability and who I think would beat who above pure accomplishments ( not that accomplishments dont count for anything) I think Mayweather is a better boxer than Pac... but in the end of the day this is the nonsense that is pound for pound, for how much it gets talked about it really doesnt mean that much of a deal to most people.