There is a lot of common teams between these two, like Lexington, for example:
They beat Lexington 27-26, Jackson Southside beat Lexington 24-21, Marshall Co. beat Lexington 31-20.
Greenbrier beat Marshall Co. twice, the last time, in the playoffs 35-0, but they beat Lexington 31-20 and beat JSS beat 24-21.
So Greenbrier beat the top two teams in 6AAA and Kingsbury barely beat the #2 team outta 6AAA, (Lexington) and we beat the playoff team that beat that them, (Marshall Co) 35-0.
I don't think Kingsbury has seen a defense like Greenbrier puts on the field and will struggle against it's athletism and disipline. Did you know that JSS only had 6 offensive plays in the second half compared to Greenbriers 40+? It's hard to score when you don't have the ball. That game was more like 27-7 that the 14-7 score cuz of some poor offical spots and missed FGs.
As the great ones say, "Offense wins games, defense wins Championships".