112mm is in the middle of the range of medium sit bone width. Add around 30 for the saddle width. However the shape of the saddle is as important when the saddle width is in the right range. Maybe one person likes having a little more support from the sides and another needs more curved sides.
KOPS vs "balance" are both gimmicky IMHO. They describe where a good saddle position might be, but don't determine where that point is.