Both movies were directed by the same person, have the same main cast and are kept in the same neo-noir style.

Both movies are based on the same opera from Yuan dynasty called The Great Revenge of the Orphan of Zhao

Four Springs is an unscripted documentary about lives of an ordinary family, while Love Education, while scripted, feels very authentic, just like Four Springs.

Both movies focus on how families deal with their feelings after death of their loved ones. In Guo Mie previous wife and current wife meet during funeral of their (ex)husband while in Love Education wife and mistress's daughter have to make a compromise regarding moving a family tombstone.

Both movies are Thai arthouse productions set in a forest, have plot that's confusing at times and are beautifully shot.

Both male leads are involved with police and crime solving (one of them is a coroner, while the other one is a private detective) and have their own ways to uncover murders but they share one thing - they talk to dead people.

Both movies are directed by Hou Hsiao Hsien and depict clash between innocent children and darker world of adults.

Both Big Brother and The Man Who Kills Troubles are about soldier/mercenary turned teacher who do their best to educate youth using means they learnt in their previous careers.

In both productions a bunch of dirty cops, riffraffs and prosecutors use unconventional methods to take down powerful and corrupted politicians. Both have lots of violence, although Asura is slightly bloodier.

Both productions tell the story of people who 'died by accident', are reincarnated in someone else's body and have to take care of stranger's family.
Both protagonists did some morally questionable deeds in their 'first life' and get a second chance to right their wrongs.

Can't explain too much without spoiling stuff, but both dramas are about normal people and how interacting with murderers changes them. They give off similar, suffocating and dark vibe.

Both movies were directed by Toon Wang and tell the story of a group of mainland chinese soldiers who've come to Taiwan and adopted a child, forming a foster family where none of the members are blood related.