Hope all is well

I have 3 questions please in Leonardo:
1- When comparing files A and B, does the 2D map shows A-B or B-A ? I need to know wich case is the hottest.
2- Can we check whether the building materials chosen in Spaces have been applied in Leonardo ?
3- How to do a video simulation showing dynamic wind vectors and zooming in and out of the area
Thanks a lot for your help