Animation Quality : 10 (Very good imo, not many cut-corners from what I seen)
VA : 10 - Splendid... Then again, if I understood the language, I might be able to judge more fairly
Script : 10 - This one definitely gets the most points. Script was brilliant and thought-provoking.
Edit and Adaptation I cannot rate, I don't know much about those two external sources.
Maybe my rating of Spice and Wolf is absurd, and I'm simply overrating it, but in this case, it comes down to Originality for me. This is a one of a kind. No doubt.