I have 2 shapefiles: shapefile A (yellow) and shapefile B (purple). I already did some basic data cleanup on shapefile A, but now want to use shapefile B because it has less overlaps between polygons.
How can I detect the difference between the 2 shapefiles? Basically I want to remove the differences. So in the following image, the purple polygons on the right (shapefile B) should not be there as they were already removed in shapefile A.
I tried in the Difference tool in QGIS but it didn't help.