The background, Stelle in the fourth panel, and a lot of Firefly in the first panel, are all blatantly traced. However, Firefly in the second and third panel is completely new, and of course the coloring is new.
It's odd that this artist wouldn't have credited the other artist, given that fans are very obviously going to notice the connection. It isn't even the first time this artist has been called out for uncredited tracing: post #8485324 is a trace of post #8424618.
