Hi, for people who have both this and the realistic portrait course by Stephen, what are the main difference between the two?

Guys I am struggling with measuring and getting likeness with my reference, I feel like I am not practicing deliberately to improve that, any advice?

My first take following along Stans demo, I have been learn from Lommis head and hand book and do mostly outlines of prtotraits, I have been gradually trying to learn how to tone or the polygon verson of the human head. It is quite frustrating to get so many wrongs dispite working on this rather slowly (3hrs), proportion is off, lines are not confident, shading mostly following what Stan does, any tips on how to improve? I feel like I should just go back doing quicker protraits study to get the propotion right, while continue to study the plane relationship.