Working with SketchUp Vs FormIt file types and InfraWorks...

Have you ever wonder why if you import an FBX file from any of the available sources like SketchUp, FormIt, any AutoCAD Based software, Revit, Navis to name some of them in InfraWorks regardless of the file units the results are all over the place, sometimes it works, sometimes it doesn't, but must of the time the object or objects are in the wrong size...???? 
Well, I took the time to do some comparisons between an export from AutoCAD, FormIt, and SketchUp to the most used file formats Collada (.DAE), .FBX and .OBJ and the way they behave when you import them in InfraWorks as a 3D Models or if you create a 3D Model Style with the same file types...
I worked with a 10-foot Cube, simple and symmetrical geometry for testing porpuses.
Here are my findings...
If you import the same Cube created and exported out from the above-mentioned software into InfraWorks and configure the files as a 3D Models, this is what you get...

Now using the same files side by side as 3D Models vs 3D Model Styles:
- Exported from AutoCAD C3D as an FBX

- Exported from SketchUp and FormIt as an FBX

 - Exported from SketchUp as a Collada (.DAE)

 - Exported from FormIt as a Collada (.DAE)...

Please be aware that I am ONLY making a comparason on the behavior of the objects size wise, none of the examples above include textures, that is another subject ... ;)
Hope this will help you to get a better picture of how to work with the different file types and the software that create them...
Cheers!