it all changes dependin where you are on the bars, cause as the torso rotates so the relative location of the hip socket.
hip/femur scribes an arc around the point of rotation - the contact point of the sitzbones

KOPS, like lemond saddle height formula, a std reference point, a start, not the necessarily the answer.
when I was doin a lot of crits - I preferred forward of KOPS. I got tired of spendin most of the races with the horn up my ass.
Since I'm now at, and have been for some yrs, 30.5 cm behind BB (sitzbone contact), I would prolly find myself Heisenberg close to KOPS; if I actually gave a crap.
For many it's a good start. Others will find themselves well off. You gotta start somewhere?

OP - do ignore the axle obscura thang, it's total BS. That it happens is random, like a squirrel crossing your path at the same instant a dog walker decides to let his dog loose and a seagull drops his load directly over you...
Get the saddle positioned for what works best for you in most of your riding, then move on to deciding bar dims and placement.