The head is lovely. You've done an incredibly good job on the skin and beard stubble. Great work!
Me thinks that perhaps you put one too many layers of the shadow over top. Either too any layers, or the layers weren't diluted enough. The result is the same for both, which is that your colors lost their vibrancy. Second photo looks better than the first, but I think what 10ball and others were speaking of was a barely perceptible glaze. This makes the colors look a part of the fabric, rather than painted on. while you accomplished this, I think it went a tad too far. Still looks great!
Edit: Could just be the photos because I compared them and there really may not
be as much difference as I thought.