There is a critical stat missing and we should see team records. The stat is Run support per start RSG. It can be added easily in the customize drop down. Team records help one understand the context of player performance (see Steve Carlton 1972).
It's not close if one feels certain counting stats matter. Based on overall value both are equal IMO. To separate them one must get to second and third order values which carry less weight (again IMO). I can still count so I'll throw in a counting stat of my own. Kershaw made three less starts but is only 5.2 innings behind Fernandez. That suggests to me Kershaw pitched deeper into games tied or behind than Fernandez. Run support and pitcher game logs a la BR would help determine if this is true.
I'll be contrarian for fun and pick Kershaw because I suspect he pitched for a weaker team. That breaks the tie if true. Having said all that, I wouldn't argue against Fernandez much at all.
Isn't it great we can discuss this as if it really happened.