Instead of a one time thing, create and save the comparison set in a toolbar table. If I want to run again I just need to hit a refresh button for the specifc set.

When developing a project, keeping track of cut and fill volumes between design and existing is a must. This tool would make life way easier.

The sets would retain the terrains compared and the boundary element. So if I want to quickly see the impacts on the whole volume or in so specifc area I don`t have to go through all the clicking and selecting again.

CIVIL 3D volume tool works like my idea. It`s very easy to check 10+ scenarios in a one table view. Even subscenarios is possible: A whole terrain vs whole terrain and a bunch of children cropped scenarios.