Blender, nothing special that stands out over any other 3D modeling program, its just free as you said. thats about it. Zbrush on the other hand kind of stands alone when it comes to Sculpting,sure Blender can sculpt also but no where in the same league nor with all the options which come with Zbrush. Just choose the one based on what your trying to create (as in if all you wanted to do was create weapons or hard edge objects, sure Zbrush can do that but not at a price of 895 dollars , when the same can be done for free in Blender,basically make sure you get whats best for you.and what you want to create.

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HP Zbook 17 G6,  intel Xeon  64 GB of ram 1 TB SSD, Quadro RTX 5000 

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