I had no idea this was an anime or novel when I read the manga so can't comment on how it compares. The cartooning is very well done, though there is a lot of fan service, which is somewhat weird, since when its not doing fanservice it's pretty well crafted science fiction horror blend.

Having only read 4 chapter so far, it seems the fan service is leading to some genuine relationship places, which is very interesting. Too soon to say what I think of it overall, but this is certainly an above average scifi manga with an interesting world slowly being revealed.