The interesting thing about the 20-20 h2h is that Djoko is 7-6 in slam meetings and 2-1 in slam finals. So Novak has the upper hand
As for Rafa, he's 23-21 (9-4 in slams) vs Djoko and 23-10 (9-2 in slams) vs Federer. It's not even close. Even if Djoko ties the head to head, Rafa's lead in slam meetings will always remain. And that's why Rafa is the GOAT.
He's 18-6 in slams against his 2 biggest rivals, career golden slam, 14 slams, a slam for 10 years in a row, at least 2 slams on each surface, most slams at one event, slams on 3 different surfaces in the same year, most masters 1000 titles, etc. it's quality over quantity. 18-6!!!!!
The friend of KiAO always miraculously being in the opposite half from peak Federer & young Djokovic for eight HC slams in a row 2008-11, but miraculously always with the young Djokovic at RG certainly helped him a lot with his slam h2h record.
Nadal also never had to play one of the two best current HC players in SF, 2008-11 Federer/Djokovic and from 2012/today Djokovic/Stanimal, but just had to wait on their numerous tough SF/QF 5-setters, making HC finals over Gasquet and Youzhny, usually with a day of the rest more as the icing on the cake.
Nadal is always on the other side of the draw from Djokovic at AO/USO/Wimb. since 2008. thus protecting his H2H by playing Djokovic there only when 100% ready in the finals, against usually tired Djokovic because of Djokovic' a lot tougher draws or because Nadal would took 7 months off to recuperate fully, while Djokovic played every single masters and slam final in the meantime.
Let them finally put Rafito in Nole's half or quarter at AO/USO/Wimb., instead of Olderer's, as they would almost always put Rafole together at RG, and then let's see their h2h by the end of the next year.
That's not possible though, because not only Nadal but both Fedal are always in the other half from Djokovic at AO/USO/Wimb. for mucho, mucho slams now, and that is not going to change the next USO nor AO because Fedal cannot make the HC final even from their easy-peasy half, let alone from Djokovic' half with Stan/Nishi and other HC contenders there by default, but at least Federer can make a SF and some bucks to slams, TVs and Nike.