@ANITOPI yes there is a way to do it so that you can get the variance based on multiple different quantifications.
for some reason, the default show changes comparison defaults to whatever the quantification of the object was when it was first published to Assemble, but you can add other quantifications by adding them as columns.
You have to select "show changes", then go to columns and add. So for your example, you would add the Length property to the columns and it would display a variance in both SqFt (since that is the default quantification for walls) and then would subsequently display variance in LF that you selected as a column.
It's only a minor inconvenience, but I think it's a design oversight for it not to automatically apply whatever quantification the user chooses.
Hope that helps!!
