Reasons I like KC:
I think Andy Reid coaches differently against the Pats. While he usually gets conservative, he knows he has to keep the pedal down against them. Belichick's teams have allowed 40 points 7 times in his tenure, 3 were to Reid. 1 was to former Reid assistant Pederson in last year's SB. Glad the Eagles are out so he has some time to give Andy pro-tips.
Home/away stats were pretty crazy for both of these teams as well. Pats have not been good on the road and both their offense and defense numbers show huge differences. Chiefs have been much better on defense at home as well.
One concern:
Belichick and Brady have played this game 12 times already, which is absurd. Andy Reid is 1-4 (I think) in this game and it will be Mahomes first. Maybe it makes Andy/Pat hungry but that is a huge gap.