What software are you using? This looks like a mental ray render, and it seems to me like you need more final gather rays. It also looks like you need a rim light and some bounce cards opposite your lights to get better shading in the tiny cracks. Then your displacement should look much more like your Ztool. These are just render issues, though. The model looks good and the displacement looks great as well. I think you just need the right tools make it all POP.
-Rage










