There is no way I would say Djokovic's base or floor level of play is superior to Nadal's. Ridiculous.
Nadal has been more of a factor in Majors and has been more consistently ranked #1. Not only that, but his game in and of itself has more margin than Djokovic's, so you'd expect his base to be higher.
Nadal has been more of a factor in Majors and has been more consistently ranked #1. Not only that, but his game in and of itself has more margin than Djokovic's, so you'd expect his base to be higher.