Something that might have been fixed,
Talked out or around,
But the whole school had turned out
[A] To watch them settle it.
-- Gregory Djanikian, The fight, writersalmanac.org
Bob will be there? [B] That settles it. I'm not coming. -- OALD
It seems [A] and [B] have the same syntactic constructions. Do they also have the same meanings of ‘settle it’?