Kemonozume, Tekkon Kinkreet Recommendations
Certainly their art styles are something that immediately connects the two, however they both also share the same brutal, stylized violence and grungy modern life coming into conflict with traditional Japanese culture. I was honestly surprised when I realized they weren't done by the same people! :D
Story-wise, both works have strong character development for multiple characters, and both stories are also propelled by conflicts centering shady and complicated organizations (in short: similar antagonists). Directing/art-wise, every scene from both anime feel like an art piece: carefully done, and detailed. Both use deranged (and fantastic) animation to depict disturbing moments. While the physical and violent moments are obviously disturbing (and frequent), the focus on how a character's psyche gets impacted is more jarring. While Kemonozume is a lot darker than Tekkon Kinkreet, the odd humor is still there.