The difference is the former was produced while the manga itself was still in production, so the end of the show has nothing to do with the manga.
Ihe dị iche bụ na e mepụtara ihe mbụ ahụ mgbe alaka n'onwe ya ka na-arụ ọrụ, ya mere njedebe nke ngosi ahụ enweghị ihe jikọrọ ya na manga ahụ.