Is an acute nasofrontal angle influenced more by the browridge or the nasion/radix?

[johnyjoel]

Why do some people with good browridges and good brow bone have a higher nasofrontal angle instead of a very acute one?

is the brow bone the determining factor between having an angle similar to this:

Instead of this:

These guys have great browridges but the angle is not so sharp as the other fellas. What causes this?

 

[emeraldglass]

All have strong brow ridges, but the difference in their forehead slope, nasal bridge structure, and glabella projection accounts for the contrast in nasofrontal angle. The first group og men have a steeper forehead and more angular nasal root, this gives a sharper transition. The second group has a thicker, more robust face but a rounder transition at the glabella, which softens the angle.