Hey @dcheng ,
Welcome to the community! Feel free to Introduce yourself 
to the community if you want to! 
This discrepancy is expected because Rhino is a NURBS-based modeling tool, while SketchUp uses meshes (kinda). However, you can do some post-processing to adjust the model for your specific needs.
- Use the Curic Deep Select plugin to select all the edges in the imported data.
- Ensure that the “Soft” option is unchecked so the edges remain visible.
- If necessary, you can also use the CleanUp plugin to remove any coplanar edges.