User Recommendations for Juni Taisen: Zodiac War

Both are a survival anime, one with heroes fighting to the death, and one with Chinese animals (or something like that) fighting to the death. Both anime have them competing for something that grants any wish they want.

Both shows have similar character types; like Saber from F/Z and Sharyuu, both characters are looking for a way to save people through fairytale like means. Obviously these shows are battle royals, but they never really feel like they are, Fate/Zero is more character and ideology driven, and where they then realize they're going to have to crush someone else's dreams in order to achieve their own. Personal note; I think that if you loved Fate/Zero, then don't watch UBW, just don't. If you loved Zero's top notch, meaningful fights, then I promise you, you'll love Juuni Taisen's.