similar to the 2010 ova, the 2012 anime's main selling point is its animation; in this particular case, the cgi. studio ordet (returning from the 2010 anime) and sangizen worked together to create elaborate CGI characters, weapons, and settings for the otherworld fight scenes. and oh my GOD did they do a great job. the color palette, the choreography, the creativity... you can really tell they put PASSION into it. here is a youtube video uploaded by youtuber user "hantzie" showing all examples of the amazing cgi in this anime.