Diffing Images on the Command Line

This is neat, but it doesn't seem to be actually diffing the files; it just shows both versions side-by-side. Or is it just showing a bad example?

Neat project! Just curious about why using jp2a (spelt j2pa in the article) over other alternatives such as libcaca (img2txt) or aalib?

This is great for diff'ing Gerber files or images of them.