SketchUp offers Free Trial, but formZ does not.
formZ is designed for Freelancers, Medium Business and Small Business.
SketchUp is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for formZ Starts at $439 whereas for SketchUp Starts at $119/Year.
Some top alternatives to formZ includes 3D Slash, SelfCAD, SketchUp, Giraffe, Jig Workshop Pro, 3ds Max, Recap Pro, ZBrush and Modo.
Some top alternatives to SketchUp includes Vectary, 3D Slash, SelfCAD, Clara.io, Giraffe, 3ds Max, Archicad, Revit LT and Lumion.