Both FLs are powerful and skilled in magic, and end up transferring their souls into the body of a weaker, powerless girl. The original body is burned, and then end up aiding the ML as well as being under his protection.

Both are light historical dramas with Chen Fang Tong as the FL. Both have a contract/arranged marriage to true love between the leads, and a heavy love triangle with funny situations between the trio.

Both dramas are based upon the same story and follow the same plot, but one is a mini drama and the other full length.

Both dramas have a FL who is a voice actress who works for the ML.
.........................................................

Both lead couples have a fated and magical past connection, in which the ML was saved, magically tethered to in some way, and dependent upon the FL in some way he's lacking since then (hearing vs. existing/people remembering him.

Both follow the same plot of a rougher, street smart lead falling in love with an optimistic blind FL, only to learn they are responsible for the car crash that caused her blindness and the death of her parents. One is M/F, the other F/F.

Both follow the same plot of a rougher, street smart lead falling in love with an optimistic blind FL, only to learn they are responsible for the car crash that caused her blindness and the death of her parents. One is M/F, the other F/F.

..................................................
...................................................................

Both are historical mini dramas in which the FL was injured and has lost her memory. One of the leads believe the other killed their people and stole some object and are out for revenge. Both FLs are assisted by the SML. Both dramas have a different place/dimension that the leads enter.

Both are Republican Era mini dramas in which the FL is out for revenge against the ML who she wrongfully believes killed someone close to her. Both involve the FL stabbing the ML, losing/pretending to lose her mind, misunderstandings, and a hate/love relationship between the leads.

Both are mini dramas set in a world where merfolk are mistreated and/or hunted and involve a relationship between one of them and a human detective.

Both have a mermaid/merman as one of the leads and a human as the other. Both involve a merman captured by a powerful person/sect.