New version is better. There is however still some randomness that should be worked on: part where nostrils should be and pretty much whole right side of the icon. First version had better definition on that side, but it should be improved even more to make it clear what its face structure is, therefore improving shading there as well. Highlights should be less present, in a form of bright dots on surface rather than making whole areas bright, in order to illustrate more accurately the texture.
It would benefit from darker background. Color palette is for some reason quite reduced and this scheme may not be the best option. Avoid making shadows too dark, some areas are very contrasted unnecessarily.