Those two players are very hard to compare as they have nothing in common, and belong to very different eras. If you want to bash/praise Fed, try with something easier like Sampras or Edberg.
Nadal career prediction: 6 RG, 2 Wimbledon, 1 Australian Open, 1 US Open, 2 Master Cup, 20 Master Series, 65 titles.
(Predicted before RG 2008 when he had 3xRG)
The inhabitants of the Balearic Islands are said to have been the inventors of slings, and to have managed them with surprising dexterity, owing to the manner of bringing up their children. The children were not allowed to have their food by their mothers till they had first struck it with their sling.
~Vegetius, De Re Militari, late 4th century
Nadal: the last Balearic Slinger, the ultimate product of natural selection. Feel the weight of the centuries in the Topspin from Hell!
“The goal, when I took my break of six months, was doing this for the next couple years, not just for one tournament, I understand people who say, ‘Oh, this would be a perfect moment to go.’ But I feel like I’ve put in so much work, and I love it so much, and I still have so much in the tank.”