Gravity Loads: RAM Concrete vs. RAM Frame

https://communities.bentley.com/products/ram-staad/f/ram-staad-forum/158562/ram-concrete-vs-frame-forces-for-columns-not-matching

I understand that the analysis methods are different between the two modules, however the difference in axial gravity dead loads between the two can be drastic in some cases. What is the primary reason for this in the program?