Your reply does not address the question I asked since you kept torso length constant. I have made a diagram myself to explain:
lean.jpg
Here femur length is constant for different torso lengths. You can see the longer torso, "i", requires less lean than the shorter torso "g" to keep the bar over midfoot (alpha > beta). The diagram you attached does explain it, but it varies torso length and femur length simultaneously which maybe makes it harder for some people to understand.