If you are going to take the effort to paste into an editor you might as well paste both hashes into same tab, put the cursor on one and let the ide highlight all occurances. Ctrl-c + Ctrl-f for those with less sophisticated editors.
Heck, most editors even come with a “compare selection with clipboard” option.
(The term comes from https://en.wikipedia.org/wiki/Blink_comparator and someone wrote about this in a tech context as well, but I forgot where I read it. I'm seeing one search hit with the exact expression, so it could have been something close as well.)