The first one was a little hard to see, but the noticeable changes in the hair quality for the last two really kinda highlights it, fantastic work!
In both cases, the lighting on the "before" images actually looked slightly better to me; the "after" images have less contrast, which makes the faces look kind of flat.
Not sure if this is a Mac gamma difference or if it would be helpful to add more key light and reduce the fill light just a bit.
But the extra detail looks great.