Is Carlson Survey with IntelliCAD worth it?

#1
I currently use AutoCAD with the Carlson Survey as an add-on but I'm looking to save some money and purchase the Carlson Survey with IntelliCAD. How much different is the IntelliCAD engine and will I still be able to use DWGs that engineers send for layout purposes?

I would say that about 20% of my work comes from engineers who either want topographic surveys or a building laid out, the remainder is boundary surveys. So being able to work with what the engineer sends and the engineer being able to work with what I send is important.
geometry dash lite