Jays ACE goes tonight and its not even close:
Kooch: 1.7 WAR, 2.60 ERA, 2.74 xERA, 2.61 FIP
Berrios: 0.3 WAR, 2.98 ERA, 4.87 xERA, 4.64 FIP
So many fans see Berrios as the ACE, but the numbers and expected stats don't show that.
Kooch has been lights out and better overall. Both have been good.