the achievment that sets Fed apart from Agassi/Nadal's career slams is the fact Fed has reached all 4 slams finals in one calender year - THREE times
no other man has done that since Rod Laver in 1969
you could argue Fed's 4 slam finals, 3 times in 4 years, is better than Rod's 2 grand slams.
there are many things that set Fed apart from Agassi/Nadal, but yeah reaching all 4 slam finals 3 time is a big deal.
We are derailing this thread btw.