Lord of Vermilion: Guren no Ou

Pretty similar shows, both are a battle royal with two sides (and a lot of players/fighters) fighting each other. Also, both male MCs are thrown into this battle knowing almost nothing.  

-Similar power systems that have crimson blood weapons, the character's abilities usually manifest in unique and varied ways for each person/wielder. -Battles also play out similarly due to the aforementioned abilities/power system. Both series also have battle royale aspects. Battles in both are used to showcase the different abilities and their applications. -Both have unexplained mysteries behind their series' worlds and the events they cover (mist/awakenings in LoV, what plays out with Ganta and his eventual move to Deadman Wonderland in DW). As each series plays out we learn more about their respective mysteries. -Both series have their good qualities but have various things that hold them back and generally earn them criticism, some of these are shared with both shows such as direction and pacing.  read more 

Both feature a variety of blood based weapons & attacks. Both have lots of cool and unique character designs with a distinct visual appeal.