Did they change the artist, or is it the same artist but with a new art style?

The artstyle improved it's the same artist

lol, more like it got worse

1 the art is the same. only some minor changes, if you saw the artist page the art literally improved in lighting and face angles
2 you literally are pirating this manhwa so you don't have the right to say anything about the artist so get out if the artstyle is bothering you