Re: Federer 2008 or Nadal 2011?
Too close to call so going even.
The current greatness league of active players in order of achievements to date (a factual comparison rather than fan biased assessment):
Federer 17 GS, 6 Year End Masters, 23 Master Series.
Nadal 14 GS, 27 Master Series, 1 Olympic Gold.
Djokovic 7 GS, 4 Year End Masters, 20 Master Series.