When comparing FreeCAD vs Zbrush Core Mini, the Slant community recommends FreeCAD for most people. In the question“What is the best 3D modeling software?” FreeCAD is ranked 17th while Zbrush Core Mini is ranked 19th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Powerful free open source parametric CAD
Pro Awesome community
Pro Powerful addons and easy to use addon manager
Pro Reddit community
You can find it here.
Pro Free
This is a free educational version of Zbrush Core. It allows you to get used to the Zbrush UI without paying for it.
More or less, a transitional package to Zbrush or Zbrush Core.
Cons
Con Hard to learn
Try https://wiki.freecadweb.org/ or www.youtube.com/c/jokoengineeringhelp for a learning source
Con Do not read AUTOCAD 13/14 file
Con Limited
It doesn't have all the features of Zbrush or Zbrush Core.
Con For Non-Commercial use only
Cannot sell any products you make using this software.
You'll have to upgrade your files to Zbrush Core or the standard Zbrush. Also will need License for either Zbrush Core or the Standard Zbrush depending on which one you upgrade to.