I have a question regarding printing resolution, that I wondered if any of the more experienced members might be able to answer....

I'm considering buying a Wanhao Duplicator 4X. The maximum layer resolution is specified as 0.1mm on this machine. I notice that in the X/Y/Z positioning specs, these are 0.02mm for X/Y axis, and 0.005mm for Z axis.

So, is the 0.1mm layer resolution restricted by the machine's firmware or are there some other factor involved? Is there a chance that with a firmware upgrade that this machine might be able to match the 0.02mm layer resolution of the Ultimaker 2?