Arashi no Yoru ni

Both are about the bond between a wolf and a goat/sheep. 

Both about a goat/lamb who's mother is killed by a wolf.In both the goat/lamb develops a sort of relationship with the wolf. 

A lamb whose mother is killed by a wolf later befriends a wolf. Both revolve around their relationships. However, Arashi no Yoru ni is much more light-hearted and family-friendly than Chirin no Suzu. Chirin is darker and more mature, not really one for the kiddies. 

Relationship between a wolf and baby goat/lamb, where the wolf serves as a mentor for the young animal. While Arashi no Yoru ni is more wholesome, Chirin no Suzu is, well, not as much. 

They're both movies that follow a goat/sheep that after the death of it's mother develops a bond with a wolf. While in Arashi no Yoru ni the relationship is more friendly and the movie is more light-hearted in Chirin no Suzu the relationship is antagonistic and the movie is more darker.  

Both contain odd unusual friendships. This one also has a bit more action in it, though. 

Touching story about a relationship between a carnivore and herbivore. While made for children, it can well be enjoyed by adults too. 

Movies that focus on the interspecies relationships and independent, caring animals that are under tension from social judgment. However, the relationship between Heart and Umasou is familial whereas the relationship between Mei and Gabu is friendly with a romantic subtext. Additionally, the predator-prey relations are seriously examined beyond the typical ‘predator = evil’ trope. Both movies finish with their own versions of bittersweet endings.  

Relation between predator and prey species, including rejection by the respective herd/flock/pack of the MCs. Both have strong "love overcomes all" messages, in Arashi's case it's friendship bordering romantic homosexual love, in Omae it's parental and family love. Omae has much simpler animation and is clearly more targeted at kids than Arashi, but nevertheless the former has the better characters and writing. 

Stories about unique relationships between a carnivore and a herbivore, and what how their nature influences such dynamics. Both are also animated in 3D CGI. 

Depicts a rather interesting and engaging relationship(s) between carnivore and herbivore. Characters in both shows are all talking animals. In both cases, the wolf has to cope with and restrain his urge to kill for food or out of natural instinct. As both stories progress, both carnivore characters undergo development with each interaction. 

Friendship and romantic relation between predator and prey species, with rejection by the respective social peer group of the MCs and trials and tribulations to overcome. In both sories the predator species is a wolf, and the MCs are some outsiders concerning their groups. In both anime the interspecies friendship is bordering romance, male-female in Beastars and male-male in Arashi. The anthropomorphing in Beastars is stronger (Beastars: furries walking on two legs and clothed, Arashi: 4 legged walking animals with human thought). Beastars has a more complex plot where the romance is just a part of, while Arashi has full focus on the relation of the two MCs. read more 

Both show the characters having a relationship that is unexceptable by their society. They both have to deal with the critisim and find way to be together. Both have cute characters. 

Their stories are focused on the development of loving, but societally taboo relationships with interspecies differences. The predatory species in the pairing is initially conflicted and reluctant over their feelings towards their herbivorous partner (Nabi/Gabu vs. Doki/Mei respectively). These anime feature many emotional moments where the characters are forced to deal with harsh realities and the inability of others to accept/respect their relationship.