Hello Gary...I never thought you'd start over, and because I have no idea when it comes to drawing, the pictures were just another way of looking at the differences in the facial details, and you're dead right, likenesses are very difficult, especially with regards to this guy as he has such a smooth face and very little in the way of expression to help you on your way.
I think you've captured more of the soft and rounded look to his face, and agree that with his mouth, it could be straighter at the left side and help to shape he's face,also the eyebrow on the same side looks slightly too arched, although this could maybe add to he's expression. I also think the little shadow under the lower lip is just a touch heavy.
I think you've done an incredible piece of work here and hope my comments help and not hinder, as they are only observations.
All the best..Roy.