Well, the only way to answer this question honestly is to look at the competition. To me, that's Porcello and Romero.
Porcello, 14-9, 165 IP, 4.04 ERA, 81 SO, 113 ERA+.
Romero, 13-9, 4.30 ERA, 178 IP 141 SO, 102 ERA+.
The reality is, no one really ran away with it. I think Porcello probably should win, but narrowly.