The sculpt is nice,yet you can add some more thickness to the neck on the side view,
make the face hair more bumpy and wavy and then try not to flatten them again when you carve the individual hair details.
The mustache can look more like the actor's if you cut the lower end of it that is sticking out parallel to the nose.
I do not say shorten it vertically.That way it not shadow the upper lip so much and will look more curvy,like a ( .
On the actor you can see the upper lip, just by coloring it reddish will not do-it sticks out too much.
So,as i said if you make the lower mustache end to touch the lip,you can add some smooth hair strands on the lip just to show the painter the lip color will show.
His mouth expression is a combination of two lines that should both show up,the lips curve that is more straight and the upside down V shape of the mustache.
The thick part of the eyebrow should not be that big,what you did is nice but it made him look much older and different.
If you like the sculpt as it was and not want to risk making it worse it is ok as it is it just has some differences from the actor.
His lower nose end is not so wide (facing).
The curve between nostril and cheek should be faint,as it is now it also gives the old look.
I can add more but i think that is enough.
When you work the sculptures you must turn it and look at it from the side more often,i think that will do the difference.
And,i hope you did not pluck out those nice glassy eyeballs that were in the first pics.