Comment 5 for bug 1661894

The difference images created with IM attached earlier might be misleading wrt to the exact amount of the differences, my mistake (I definitely need to work on my IM skills).

Using perceptualdiff on the same PNG exports:
 3360 pixels are different for 4000x4000 px exports
 2435 pixels are different for 3600x3600 px exports
  207 pixels are different for 2000x2000 px exports
    0 pixels are different for 360x 360 px exports

Up-scaling via export resolution seems to be a contributing factor.