Yes, I do think it would be the biggest fight since Hagler-Leonard.

The only other fight in that span that was #1 vs. #2 PFP was Whitaker-Chavez, and both Floyd and Manny have become bigger PPV stars than either Chavez or Whitaker. And the winner of Floyd-Manny will likely be viewed as a better fighter historically than either Whitaker or Chavez.