In both shows:
> A psychopath hides in plain sight. He has learned to read emotions since he doesn't have feelings.
> Said Psychopath falls in love with the FL and tries to understand her (empathize).
> Psychopath was raised in a disfunctional family and has a difficult relationship with his dad.
> FL is earnest, though a bit useless.
> There is a love triangle.
> Both deal with an aspect of crime.

Differences:
> Beautiful Mind is more character driven whereas Born Again is more plot driven.
> There is more romance in BA but it's built via a cop-out (fate). Whereas in BM the romance isn't the focus, but that and the relationship between the main leads is better built.
> BA focuses on crime from the prosecutor/forensic perspective. Whereas BM focuses on a hospital and a possible crime committed there.

Both shows:
> Feature students as the main cast.
> Showcases a difficult relationship between the four main characters.
> One of the characters struggles financially and feels another student has a perfect life.
> Extracurricular is a dark and gritty take, while Switched is more of a psychological thriller.
> One of the characters has contemplated suicide.

Both shows:
> Showcases a difficult relationship between the leads. In the case of Extracurricular, the ML and FL are classmates turned friends. In the case of Save Me 2, the leads are an estranged brother and sister.
> The MLs have a friend/partner who is very loyal to them.
> The ML from SM2 and the FL from Extracurricular are similar in personality: chaotic, reckless, fierce, active, destructive and overconfident. They both bite more than they can chew and must face the consequences of their reckless decisions.
>The FL from SM2 and ML from Extracurricular are both hardworking people who prefer to play things safe. They both sometimes fall victim to the other leads recklessness.
> The show demonstrates how easily people can get corrupted and how people take advantage of those close to them.
> You get some old-school fighting.

Both shows:
> Have students as the main characters.
> Showcases rivalry and friendship between the cast.
> Demonstrates how easily people can get corrupted.
> The FLs are active in both shows and establish a difficult friendship with the ML.
> One of the leads is well-off while the other struggles financially.
> You get some old-school fighting.

It has a similar vibe in regards to an adult noticing a child being abused by her mother and wanting to keep that child safe.

In MFN the ML ends up searching for her after she gets kidnapped. In Mother, the FL kidnaps the child (her student) to keep her safe from a child serial killer who's dating the child's mother.

In both shows the ML and FL put everything they have on the line to get to the child.

Both shows focus on a demon controlling (Possessed) or taking the shape of other people (Metamorphosis). The tone of both the movie and the show is bleak and dark; with the end game always revolving around having to make sacrifices in order to win.

It's by the same director and both shows focus on supernatural/exorcisms.

The main antagonist (demon) is also targetting the main characters in both shows. In the case of Metamorphosis, the demon targets a Priest's family; in the case of The Guest, the demon targetted the three main protagonists' families and then he zeroes on one of them (a Shaman).

Both shows have the same light-hearted vibe, even though the leads have also faced some difficulties. In addition both shows:
> Create a situation where the leads have to share a house.
> The leads start off like frenemies, but quickly become friends.
> There's a balanced relationship between the leads.

Both shows have the same light-hearted vibe, even though the leads have also faced some difficulties. In addition both shows:
> Showcase a hate to love / enemies to lover type of relationship.
> The FLs tended to keep people at bay due to a past trauma.
> There's a slight love triangle which, thankfully, gets abandoned.
> ML is extremely sweet towards the FL and almost acts like a different person.

Both shows pit the ML against a cult:
>> In SM the ML is trying to destroy a religious cult and save one of his classmates (the FL).
>> In Voice 3, the ML discover the mastermind behind the serial killers from Voice 2, who is aiming to groom new serial killers.

Both shows pit the ML against a cult:
>> In SM the ML is trying to destroy a religious cult and save one of his classmates (the FL).
>> In Voice 2, both the ML and the FL discover and try to take down a cult/group of serial killers.

In both shows, the ML knows there's a group of people corrupting those around him, but very few people believe him. As the ML sets out to prove he's not lying, he ends up tackling the corrupted group head-on.

Some differences:
> In SM2 the ML tries to take down a scammer who is posing as a religious "elder" and is trying to build a cult in the ML's town. While in Vagabond, the ML tries to prove that a plane accident was actually caused by a group of individuals hoping to get a government military contract.
> Vagabond lighter than SM2 and more action-oriented. SM2 is slower-paced and more psychological.
> In SM2 the ML and FL are brother and sister. In Vagabond, the ML and FL become friends and then fall in love with each other.

Other similarities:
> Both MLs are great fighters (and almost a one-man army).
> They do have people that are loyal to them.