Not bad. I think you did a wonderful job shaping everything. the ear needs a bit of work IMO though. It seems a bit off with just that one black shape. Feels liek there should be a curvey thing on the left side of it somehow, but i didnt see the original stock so i wouldnt exactly know.

The coloring is good though i wish you gave your facea bit of color. Garuntee your not gray in real life. A nice soft skintone would have been better, and would have made the blue tie stand out a bit less.