If you are using FreeCAD, probably try to run Solvespace or read one of it's tutorials, and you'll see the difference.

I have not used both apps extensively, but clearly FreeCAD is much bigger tool with wider use-cases. If talking about 3D cad only, I like minimalist Solvespace's approach better (from UI/UX stand point and from source code's perspective as well), easier menus, easier use (simple shortcuts), readable and rather small-ish codebase.