First of all I can only state my opinion after jumping into this manga after I have finished the anime. I really liked the anime and how the characters where interacting with each other which is why I wanted to give the manga a try.
The art still mainly stays the same but the way the mangaka illustrates the patterns is quite disturbing. The story is told more like an omake.
I still enjoyed the manga though. It's just that I wouldn't recommend reading it after you have already finished the anime...
There are some more information that are added but don't really change the conclusion. The anime basically covers the whole manga's story but is told in a more suitable and likable way.
