The difference is that Federer is competing at the absolute highest level where his technique, strategy, and experience is near perfect.
Which is exactly why he shouldn't switch racquets as his entire game is honed to his current racquet and switching would more than likely screw him up.
The thing that's holding him back (AT THIS POINT, which is late into his career) is his equipment.
It's his body and his motivation that are holding him back.
The argument that says that he won his Majors using an outdated racquet is faulty because of the time frame when he won his Majors.
Why? Didn't all the people he beat to win those 16 Slams use bigger racquets just like they do today?
I doubt Federer played better in 2010 than he did years ago.
He didn't. That's why he only won 1 Slam instead of 3. But it had nothing to do with his racquet.
I DON'T doubt that Nadal played better in 2010 than years ago.
So did many other pros. And many other pros played worse in 2010 than years ago, while many others played the same. Pick a year, any year, and that will be the case. Some pros played better, some worse, some the same.
Back then, Federer could play with his small racquet because he was at his peak (independent reason) while others are still improving (independent reason).
Huh? You mean EVERYONE was still improving back then? No one else on the tour was also at their peaks for nearly 10 years?
At this point, he's not at his peak, he's PAST it and again, his opponents are also BETTER.
Really? ALL of his opponents are now better? How about Blake, Hewitt, Ljubicic, Davydenko, Andreev, Ferrero, Stepanek, Tursunov, etc.?
His physical abilities are declining as we speak. There's a reason why you see senior players with 125" pans, but played with 95" when they were younger.
I also see lots of senior players using PS 6.0 85's, Max200G's, and other smaller racquets. Oh, and are any of these senior players using 125 sq. in. pans going to beat Nadal or Djokovic regardless of what size racquet they use?