This might be lossy-lossy (i.e. worse than post #11696691). The artifacting is a bit worse as well. When you get the image off of the site without any parameters, it resolves to a WebP, but the sample is formatted as a JPG. These might all be the wrong links put in the uploader.

I revisited this after a while and it seems like the JPG is better, looks like I got the wrong link when I uploaded it as WebP.