Why is there a colored and b&w version? Did the artist redo it?

You know how there's some mangas on this site that look like webtoons? They separated the panels and put it in a long canvas so you can read it scrolling, some people even colored it too
I'm pretty sure they made a digital version (the colored one) at first but it felt through and now they finally uploaded the normal manga one (b&w)

Ah thank you. It’s okay as an extra but I prefer the normal version :O