Furix

Layout (Paperspace)

CompareDWG does not compare Paperspaces.
Only Modelspace and the tables are compared.

The temporary drawings contain all Paperspace information from their parent (either from the old or the new drawing). This includes the viewports, which makes it easier to inspect these drawings if you open them in the regular way (with File Open).
However, these temporary drawings are then combined into result drawings using the Xref mechanism. Xrefs do not support Paperspace. Therefore the result drawings that will be shown in AutoCAD have an empty Paperspace.