Recommendations

Their both comedy's and romances <3 They both show love between human and mermaid's. Comedy moments were awesome, and romantic moments were alluring.

It is also a legal setting, but more like legal aids than lawyers. Doing what is best for the client is as different as each client themselves

Both films are about historical wars inspired by real events and old tales. They involve two great heroes – who by cunning and courage – saves their nation from hostile foreign forces. Willing to sacrifice themselves, they're selflessly fighting for what's important; to achieve lasting peace and to protect their country, and countrymen. The movie Mulan, though, have elements of romance and a stronger fokus on friendship.

Both are about a religious cult that recruits people and their families. The main male leads tries to save the female main character from her family and the cult that holds them bonded by manipulation, cruelty and wile. Both Save Me and Love Exposure have a darker theme, the latter is a Japanese long film though, with romance involved.

A joseon woman dreaming of becoming a doctor becomes an apprentice of a 21st century doctor who travels in time. Very interesting story, with time travel and addressing the meaning of what it is to be a true doctor. However, the quality of Dr. Jin's story turns out to be inferior to that of Dr. Heo.

Both are about crime teams solving serial cases. The characters have their own stories, which are explored to varying degrees, around each of the cases, while an overarching plot brings the series together.

Similar plot, love triangle (one woman - two man), sarcifaces for love, treasons for love, lots of fight (swords) scene.....

Both have the same concept of switching bodies; i'm still watching Dear Prince since it is still airing but they are both pretty funny and the characters seem the same ( girl is bubbly while guy is more rough) so it makes it interesting to watch. both pair of actors are extremely talented and have good chemistry.

Similarities:
- Both use a supernatural way to solve crimes - and uses this element to make matters more interesting other than dragged out.

- Both share some kind of love triangle. (Have only seen until the fourth episode of "While You Were Sleeping" when writing this recommendation, so I could be wrong.)

- Both share some of the same genres. (Including Romance and Supernatural)

Differences:
- While "Who Are You" is set in the world of cobs, "While You Were Sleeping" is set in the world of prosecutors and lawyers.

- In "Who Are You" the main female protagonist can see ghosts/spirits of their victims while in "While You Were Sleeping" they can predict the future through dreams and strive to change them.

Both female lead got injured seriously went back in time in someone else's body n found their true love.

Both dramas are about the female lead trying to make it as an actress by starting from the bottom. In both dramas, they get help from a veteran actor. In Skip Beat, the main girl uses her past to fuel her ambition, while in Dear Prince, the main girl struggles to overcome her phobia. Dear Prince is more of a supernatural drama, while Skip Beat can be considered an idol drama.

Both these dramas center on spunky and sharp-tongued young girls. We also see their family dynamics and friendships.

One gets a feeling of melancholia while watching these girls going through first love and navigating through their youth during a time that's long gone.

lead actor who is a cleanliness freak & adopted
Both leads living together , all the ex boyfriend drama , misunderstanding
Similar premise

Has a similar feel as it is written by Taeko Asano who wrote the screenplay for Last Friends. Deals with darker aspects of love. Opening is also sung by Utada Hikaru. If you liked one you'll probably enjoy the other.

Not much similarity but in both dramas the lead girl is their class monitor and tries to solve her classmates' problems with the help of the male lead.