QGIS » QGIS Application

In case of layers with essentially the same shapes, with different precision, the diff between these layers produces a number of virtually 0 width polygons.
These microareas are tricky and time consuming to remove (if they are isolated, a possible solution is to select and remove those smaller than an arbitrary threshold, but if they are linked to some "real" polygons, this will not work).

I suggest to add a parameter in analyses, to either snap original data within a threshold before running the analysis, or to clean up the results afterwards