Seo In Guk is in both of these and he does a darker role than he has done.
They both have similar tone ( The Smile Has Left Your Eyes is a bit more darker).

They are different in tone and story, but both of the main female character is visually impaired.
Always is darker than Page Turner, but they are just as good.

They both have adults going undercover as a high school student.
Both are about bullying and school corruption.
The difference is that Angry Mom has one main story-line, but 35-sai is a formulaic story-line.

They both have music as its theme. Both have a darker side to music (when it comes to the male lead). Both have characters that play a violin and a piano. They both have a similar tone/mood in the show.

They both have different story-line, tone and feel, but one thing is the same: the female leads can see the supernatural (ghosts). Akuryo Byoutou is much more darker than Oh My Ghostess.

Both male leads are framed for murder and they try to find out who really did it.
Both male leads are prosecutors.
A Violent Prosecutor is more light hearted than Defendant, but both are still a great watch.

They both have a similar tone when it comes to the relationships in these movies.
They are both about love that not a lot of people in society accepts: A Muse is about a relationship between a teenager (still in high school) and a much older man. Then Boku wa Imouto ni Koi wo Suru is about a brother and sister in love with each other.

They are both amazing stories about the lead not giving in to their illness.
1 Litre is a true story while A Millionaire's First love is not.
They are both uplifting, tear jerking and great movies to watch.
The only difference is that A Millionaire's first love has romance, while 1 Litre only hints at romance (but not the main theme).

They are both take place in reality game where the contestants are trying to win money.
They both have similar tone and mood of the movie.
100 Million is a bit more darker than Liar Game because LG has more humor than 100 Million.

They both star Lee Min Ki in a darker roles.
They both are great suspense/thriller movies.
The difference is that A Million is a game show and Monster is a revenge story.

They both have obsessive, forbidden love story.
They both have a similar tone, but Frozen Flower is more intense when it comes to the love line.
Both love stories are dark and not for the faint of heart.

They are both are based on true stories that happened during the movies' timeline. They both are very good and recommended to anyone who love war movies. Bring tissues for both of these movies!!!

The only difference is that 71 takes place in the Korean War and My Way takes place in World War II.