I attached an image and drew in red some observations I made. What I drew may be a little more exaggerated than what is actually there, but it’s just something to pay attention to.
Take a look at the pic in the upper right of your reference collection you posted. Her chin seems to be more defined and the line from the jaw to the chin isn’t so straight.
Also look at the middle bottom reference pic of her front view and your model’s front view. On your model you can draw a line from the bottom edge of the nostrils and it will be tangent with the botom part of her nose. In the referenc pic, the bottom of her nose is lower by about 1/8" - 3/16". That pic also shows the chin as being a little more defined.
Her bottom lip is almost one continuous curve. And the center part of her top lip (I think it’s called the central vermillion tubercle) is more pronounced.
And in the ref pic, her neck is just a hair wider than your model.
These are just picky crits for a model that is pretty close. Really nice work so far!
