Why? The only person Bradley has ever lost to was #2 P4P Manny Pacquiao, and the only person JMM has lost to in the last 9 years who wasnt ATGs in Floyd/Manny was an undefeated P4P Prime Tim Bradley. Other than that, he's beaten everyone. Plus they both have W's over Manny.
Nobody underneath them have the recent resumes that they have
I should say, I don't agree with Bradley's W over Manny. I put that in the Max Kellerman comment category of just because a fighter gets a W, you can mentally change it and judge a fighter by your opinion. The record book may say Bradley beat Pacquiao, but he has two L's vs. him in my book.
It doesn't hurt his PFP rating though (I judge him off the 2 L's anyways). He lost to the #2 or #3 PFP fighter in the world, no shame in that. Already see this playing out in Mayweather vs. Pacquiao discusssions. Fans of one side want to put down the other side. Why? You should hype up the other side, it makes your W all the more impressive. Either way, I think it is pretty much indisputable that Floyd and Manny are two of the top PFP fighters. A win should cement that fighters legacy forever and mean they deserve that #1 crown. A loss means that fighter fought the best opponent available and an all time great, in many respects it helps your resume. But if (when) Floyd or Manny loses vs. each other, are people really going to say the loser deserves to drop out of the top 10?
At this point both fighters have cemented their legacy. The fight vs. each other really just determines how their legacy vs. each other will be settled.