I don't see how H2H is relevant is general, but especially when it comes to one event, it becomes really stupid. Especially in the case of Cinci (the real slam), a tournament Federer won 7 times and Nadal just once. Are we supposed to believe Nadal > Federer there? Really? Stop trolling.
And btw, Octobot always goes for the "he injured himself during practice before the match" but I don't remember Nadal being impaired until Wawrinka had him under water, leading a set and a break, when he suddenly coudln't movve and started serving around 120km/h serves.