Winners & Losers - Who would You Fire?

This guy:
Overall Win-Loss: 141-116 (%55)
Playoff: 5-6
1 Conf. championship
6 winning seasons out of 17

Or this guy?
Overall Win-Loss: 26-13 (67%)
Playoffs: 0-1
5 winning seasons (games started) out of 5.
QB rating improvement from 64.5 to 98.6 in last 3 seasons.

Looking at these numbers, who has more upside? Who's getting the job done?