Wow, a 5 years old discussion has been dug up. 
Let me add that I switch to ZBrush a lot less since the availability of the OpenVDB Remesh Blender add-on by @ambi, and the Mask Tools add-on by @anon92502066 and @Bookyakuno. Those add-ons effectively replace ZBrush Dynamesh and the ZBrush masking toolset for me.
The only killer ZBrush feature I still miss in Blender is a really good auto-retopology tool like ZRemesher. I am eagerly waiting for a coding genius to take on that challenge.