Ok, lets look at the numbers:
Brookfield- 3-0 112 points scored, 28 points allowed
Won week 1 against South Shelby 40-7
Won week 2 against Highland 47-7
Won week 3 against Marceline 25-14
Combined opponents record 4-5
Centralia- 3-0 160 points scored, 38 points allowed
Won week 1 against Highland 48-19
Won week 2 against Clark County 40-0
Won week 3 against Louisiana 72-19
Combined opponents record 2-7
Brookfield has played a slightly tougher schedule, is coming off the Bell game which is always emotional and taxing, and has a decent road trip to Centralia. Centralia hasn't really played a team that was a challenge or one that is a good measurement. Their only common opponent is Highland and Brookfield had the more dominating performance. I would go with Brookfield if they are still just as focused during the week of the Bell game. Brookefield 32 Centralia 28