Djokovic has whopped Nadal in the H2H over the last 10 years. There is no debate or discussion to be had. I'm sure that's frustrating for Nadal fans, but it's just a fact. It was frustrating for Federer fans when Nadal was dominating their H2H. It's frustrating for Djokovic fans that he's behind Federer and Nadal. That's life. Worse things happen to people.In the context of playing 55 matches, only THREE were on grass (because we hardly have a grass season), and Djokovic leads 2-1 on grass.
So this rivalry is essentially about hardcourt and claycourt.
So your revelation is really that Djokovic won majority of their hardcourt meetings, and Rafa won majority of their clay meetings.