Recommendations

Both are revenge themed historical dramas. The whole family/clan was massacred.
The male leads are extremely smart/genious and both don't really know how to fight.

Despite having different storylines here are some notable similarities:

-slow burn romance.
-mature/ calm vibes.
-family setting, how family impacts one’s upbringing and view of life.
-may give the impression of boring storylines but offer depth and need patience to wrap your head around how everything unfolds.

If you liked one of these, you might consider adding the other one to your watchlist!

Two world/time-explorers with their own motives, one experienced, the other new to it. Male-lead drama. Maybe hints of at least strong bromance in The Company (censored danmei in The Spirealm).

Good (unexpectedly good) production values. Pretty good ED song, nice OP, too.

If you like Dark Romance you'll love this series. Just give it a try. The production quality, acting, cinematography everything's just so perfect.

Cool and handsome ML falls hard for the cute and shy FL
Fantastic chemistry between the ML and FL
ML cries at some point in the drama

The plot is not really similar, but they both have similar vibes
Also the ML is down bad for the FL

Both have the similar plot: FL witnesses her husband cheating on her, dies that day and is reborn as the mistress, and decides to take revenge in this new body.

Kasumi Arimura as main character on both movie. The story has similar plot about someone who has someone else's memories.

Slice of life/melodrama-leaning dramas with a focus on what it means to be a family and to navigate challenges, trauma and love.

Both FLs lost their families and status and now live in a rural village. Both MLs are princes who are injured, lose their memory, and lied to by the FL/her family in order for the FL to avoid an unwanted marriage because of a royal decree that all unmarried women must marry. Both leads have a past childhood connection.

the setting is different (from a historical setting to a modern republic of china), however it has some sort of similarities which i will list.

- face-swapping ; both the female leads has their faces swapped for a pretty similar reason (to serve a man, unfortunately)
- both female leads do quite well despite not being the brightest ones, not too naive but does need constant saving from the male leads.
- both has wang ze xuan playing as an antagonist (he was still a womanizing jerk with petty schemes), so a familiar face might convince you to watch the other.

i'll finalize the recommendation after i finish them both!

Both dramas focus on women who are intelligent and bold. The male leads are just as powerful and shows a equal power dynamic between leading couple. Also, it's a wuxia type drama filled with sects, leadership and betrayal.

Both are comedy jdramas about police officer at a small police box. While Kochikame is about 4 officers at a police box in Tokyo, Honjitsu is about a lone police officer on a remote island.

Both are comedy jdramas about a police chief who manages chaotic police officers. While Kochikame is about life at a police box, Ikegami is about life at a police station.

Both are hysterical comedy jdramas about reckless police officers out to solve cases by any means necessary. Similar vibes and humor.