Demon sculpt - wip in Monster Clay

The last two days I worked on an older wip - a demon bust, inspired by this artwork on deviantArt:
Horn by Dozen13

Here's a picture from the older version:

But I really was not satisfied, so I tried to get him looking more like the artwork (what a nice english :D, I hope it's clear what I mean...).
And this is what he, Mr. Nice-Demon, looks like now:

I think it's clear what happend to him. ;-) Now I have to define the muscles and overall structures and after that I will try to texturize the skin... If you know some techniques for this, please let me know. ;-)