Just the posters are good enough.

That’s correct both movies have the same 2 main leads.
Obviously as protagonist and antagonist.

Just try it out.

Both have similar vibes though the stories are very different.
Crime , action , murder, and so on.
In a way both are about psychopath killers.

Liverleaf is much darker and includes blood, though both the movies are based on bullying.
Both have similar vibes.

Both the series is about the job of housekeepers.
Though there are differences as in the later ML is disguised as woman.
There is high chance u might like other if u like one.

The premises of both the dramas are very different.
Both ML can see spirits and the plot is around that.
From Now On, Showtime has much more to it like: investigation, Murder, and so on...

However if you like From Now on Showtime, just try couple of episodes of XXXholic, you might like it.

Both have similar vibes about a virus infection and changing peoples mind.
Dark hole is produced on a large scale and has action sequences.
Crows blood is more of drama however has some gory blood scenes. Is happens in the school setup. Though its not a great series, just can be seen if someone has inclination for this genre.

If someone likes this kind of theme, they can try crows bblood.

Both have the same theme which is revenge .
Oldboy is a movie and it has action sequences however Black revenge is more of a drama and mainly revenge is achieved through publishing scandals.
Just if someone is interested in revenge genre , both are pretty decent to watch once.

Both are revenge dramas. Though the premises are different.
Both are decent dramas.
Black revenge deals with scandals however maou has investigation and detective setup.

Both have similar vibes about revenge though the premises are different.
Black revenge deals with scandals and in media however Alice no toge is setup in hospital.
Both are good to watch.

Both are revenge dramas, though the premises are very different.
Though Doctor prisoner is more entertaining, Black revenge plot is also decent.
Black revenge deals mainly with scandals.

(Note there might be Spoilers !!)

Though both series give similar vibes, Kyouso no Musume and Girl from Nowhere are very different from each other , just that the initial settings ( and only few aspects) are slightly similar.

Nanno of Girl From Nowhere displays supernatural abilities many times. Also her family details were never known and she changes to different school in each episode.

Kiritani Sara doesnt exhibit any supernatural ability and of course she is very keen about minute details and intelligent as Nanno. Also there are possessiveness and revenge elements in this plot and they are main aspects in this series. Note that Kyouso no Musume are of bit shorter length. And she continues in the same school throughout the series.

Both have same vibes however very different stories.
Cold fish is more of drama and Ichi has action sequences.
Anyways both compete in the aspect of bloodbath scenes.