That has to be the wrong stock image included or something, bloody hell.

     magick image-l.webp image-r.jpg -compose difference -composite -auto-level -threshold 30% diff.png

It's practically all dark except for a few spots. It's the same image just different size compression whatever. I can't find it in any stock image search, though. Surely it could not have memorized the whole image at that fidelity. Maybe I just didn't search well enough.