I still don't see a difference. (Mobile)

Here's a maybe more mobile friendly comparison:

https://i.imgur.com/zUVn8rt.png

But now that I double-check, I was comparing with the images zoomed to 200%. On desktop the artifacts are also noticeable at 100%, but not nearly as bad as in my previous comment.

What phone are you using? It’s extremely obvious on my iPhone

Have you done a color blindness test before? Red-green is the most common type and the differences here are mostly shades of green.

I typically read HN in bed where the brightness is at the minimum setting. I turned the brightness up and I see it.

Second picture looks like you were looking at it through a dirty window, there's lot of pale white stains, or light reflections, it's really blurry.

Look at the forehead and arms. The processed version looks like it's been run through a posterization filter.