Both are high school dramas
Also about step brothers
Enemies to lovers trope
Rom com story
Youthful
Cherishing youth
Creating memory together before graduating
Slowly falling in love with the step brother they hate the most

- office romance
- boss & employee
- rich guy poor girl trope
- rom com story

Even though the story might seem different but still it has so many similarities. So you might like What's wrong with Secretary Kim. It's popularity is also high. Worth watching.

Check the posters guys it's so similar
- office romance
- ML is obsessed with the FL from the beginning
- rich guy, poor girl
- comedy vibes
- rom-coms

- Law / Prosecutor
- Comedy Scenes
- Romance between lawyers
- In The Law Cafe the female lead resigns from her job, in suspicious partner, the male lead had to resign because of circumstances
- The Law Cafe : The female lead wants to open a cafe
- Suspicious Partner : The male lead quits his job as a prosecutor and becomes a lawyer.

Similarities:
- Their relation changes through story: from enemies to lovers
- Guy is spoiled but he changes and becomes a better person because of the girl
- Girl is kind, helpful and tough, she doesn't give up easly
- School / romance / comedy

- Both are short dramas
- Relationship problems
If you already watched romanced you'll find the similarity. Though the stories are not same but fast paced stories.

- Both dramas revolve around lawyers
- Strong male lead
- Revenge type story
- Solving cases in both dramas

There are a few similarities though if one liked suspicious partner I guess they will like this too.

- Both story revolves around detectives
- Solving cases in both
- In both drama, trying to save someone's life who died
- In signal they can talk through a walkie talkie, but in Train they can travel to the parallel world
- Same vibes
- Catching the killer
- Both ends with a cliff-hanger

Similar storyline
1. Relationship problems
2. Both story happens on a trip
3. Change of feelings of main characters
4. Similar vibes
5. Love triangle

Both stories are about high school student life.
Both stories have a smart male lead.
These two shows are so similar in many ways like - crush, friendship, love, jealousy.

Both stories are about autistic people. These two shows revolve around how autistic people are trying hard to live a normal life in society.