Emotional dramas. In both female lead travels to the past and try to prevent a tragedy from happening. In SOOD it is the death of a friend if I remember correctly, in TTEOTM it is the elimination of the realms by the hands of the devil god which she will be romantically involved with.
In both acting is amazing as well as OST , plot and chemistry.

In both female lead travels to the past. In Moon lovers it is not from her doing, in Till the end of the moon, the FL travels to prevent ML from becoming evil.

In both ML are dark and lonely. In both they are abandonned by their families. In TTEOTM the male lead is harshly bullied even from the woman in the female lead body before she travelled to the past. As a result he is attracted by evil forces. In Moon lovers FL knows the future and that ML will somehow become evil and kill his brothers but she decides to do nothing to prevent it because she is powerless. In TTEOTM FL travels to the past before ML becomes evil to prevent him from becoming evil and killing every sect including her own.

In both shows ML will fall hard for the FL which for the first time will care for them and show them what is love. Fl are not whiny and childish. They are strong willed and intelligent, not weak but fair when they shall. I don't know if TTEOTM is dubbed but the FL has a beautiful voice, not an horrible high pitched voice which a lot of people - like me -can't take .

Those are deep love stories that are passionate. Characters are deep and complexes. In TTEOTM we see the ML always swaying between his evil and kind side. Chemistries are beautiful, acting in both is wonderful, music, costumes and cinematography. Those are big productions.

So far I recommend this show for those who like tortured and villainous male leads and intelligent female lead and unforgettable love stories. But keep in mind the shows are both sad.

Both deal with a police inhestigation to find a serial killer. The villain in both dramas are really twisted and seem unstoppable. The actors playing villain do an excellent job in both dramas.
The female lead in eaxh drama is bright and male lead is more reserved and introverted.
In TGWSS the female lead has a painful past wheread in Flower of evil it is the male lead who suffered in his past.
Overall both dramas are addicting. Flower of evil is more heavy and the other one is more light.

When watching crash landing on you I immediately thought of Myung Wol the spy.
Both are romance between a north and a south korean. IN Crash Landing on you the female lead is south korean and accidentally lands on North Korea and thus begins her romance with a NK soldier.
In Myung Wol , the male lead is a south korean and the female lead is a north korean agent. She comes close to him with an ulterior motive. Male lead is more a jerk compared to Crash landing on you.
Personnaly I prefered Myung Wol because the romance was slower and more developped, seemed less forced than is CLOY.

The supernatural fantasy is similar. Female lead is connected to male lead. And each day at the same time male lead will teleport to her place. Their power is related to a trauma in both.

In both dramas, male lead really loves his job.

One is taiwanese and the other is a lakorn.

It really reminded me of Meetme@1006 when watching it.

Both female lead are working in fashion industry. In The vineyard man, she is a stylist and in material queen she is a model. Both love comfort and money. They will both learn the meaning of life and love after meeting a poor boy and experiencing modest life. Chemistry is excellent in both. Kissing is good in both as well. I think female lead is more loveable in Material queen whereas in The Vineyard man I had pain standing her.

The two female lead remind me of each other. They love luxury and are honest and really direct. They are both really pure and can seem arogant but this is their way of protecting themselves because they are lonely girls.
They will change when they meet a poor guy. The guy is nicer in Material queen though.In couple or trouble, the male lead hates the female lead at first and will use her memory loss to take revenge on her. Both are good, but I still prefered Couple or trouble because it is from the Hong Sissters and it was shorter and really funny.

-Both girls act as weak ( in KMSR she is on a wheelchair, on MLP she acts like a dumb girl)
in order to puirsuit their goal.
-In reality, both female leads are strong fighter. They both protect the male lead.
-The male leads are unaware of their real identity. Both male leadss are not the usual jerk, they are caring and understanding.
-Great chemestry, action and romance in both shows.
-KMSR is best in my opinon, better fighting scenes, but both are enjoyable.

Both shows are similar because:

-in healer he male lead pretends to be a geek when he is secretely a fighter. He protects the female lead.
-in mook liam petch, the female lead also has a double identity: she is a secretary which kinda acts like a retard, and her second identity is an agent. She is a badass. She protects the male lead.
-both series contain action and romance. MLP is more comedy based though.

In both dramas:
-The male lead has lost memory and is taken care of by a girl, their family think they are dead.
- Both male leads are kind and cute.
- Good chemestry for the main couple.
- The male leads are from rich families.
-The female lead loses someone of her family she loves at the beginning.
-The female lead is much stronger than she seems at first sight.
-There is someone who wants the male lead to disappear because he wants to take his position in the company.
-The supporting characters are interesting and appealing.
-The female lead ends up working at the male lead's firm.

Points of divergence:
- In SKL, the guy loses the memory once whereas in STLDFM, the guy loses his memory twice, and falls for the female lead once again.
-In STLDFM, the second male lead falls hard for the female lead, whereas in SKL, the love triangle is less highlighted.
-In SKL, the couple is more childish and it is a comedy with a light storyline.
-In STLDFM, the story is more tragic, the storyline is heavier than in SKL but there are still some comedy elements.

I loved STLDFM better because of the casting (Eugene and Ji Sung fan) and the storyline. We really felt the love all along this drama. (I am a bit sad to know that later on he married the girl playing the female rival of Eugene, and not Eugen herself????) Both dramas are good even though STLDFM is older, but in my opinion old dramas are the best because modern dramas lack something older dramas had. If you want a light drama, watch SKL, if you want to witness the birth of a "once in a lifetime and strong love" conquering all, watch STLDFM.