its almost certainly harder for the best players to win wtf, the better you are the bigger difference in difficulty. and then you have people like nadal whos like 60 65% to win RG and like maybe 20 to win wtf in current form
GS, of course.
Players that never reached a slam final like Davydenko have won WTF.
wtf of course, players who have never reached wtf have won slams like thomas johansson
that argument doesent help
But when you consider draws and the best of 5 scenario, it can be tougher to win a slam.
well the more superior to the player you are playing the more you benefit from five sets over three sets and the weaker you are...