It all depends on what you are using the software for. You need to evaluate the software based on your needs. For instance; If you are using BIM to it's fullest by modeling your building in 3D and expecting to use that information to produce not only the design drawings but the 2D construction documents then you should evaluate BIM Software like Revit and ArchiCAD etc. If you are looking only for modeling a building for just for presentation drawings and renderings / animations then evaluate SketchUp, Cinema 4D, 3DSMax, Lightscape, etc.
You can't compare Sketchup and ArchiCAD. You're either not going to get enough or buying too much.