Recommendations

Similarities:

1. Soft, sweet ML and a tough, no nonsense FL.
2. ML has a special ability used to solve cases with FL.
3. Past tragedy with a secret that creates more tragedy in the present.
4. Mix of comedy, tragedy, plot and romance in the story.

The biggest difference thematically is the nature of "evil". In He Is Psychometric, evil is ingrained and deterministic. In I Hear Your Voice, it's a matter of choices and consequences.

Same creator- I wasn’t even aware at first, I just liked it and then found out. Detached ML with a reason behind it, learning to navigate feelings. Strong FL. Great humor at times, serious at other times. Still not as great of chemistry like in LBFAD (to me) but great overall.

Both dramas are focused on women that are career driven and ambitious while giving secondary thoughts to their private life and especially to their marriage. Both women appear cold and without any second thought to their own life. At the same time the perfect marriage appears to have many cracks and gets involved in a case that shakes them.
Both give off very similar feels.

Similarity:
1) Both drama share the similar plot of role reverse between FL and side female character in the novel world ...
2) The comedy and light heartedness is also pretty much the same
3) both are based on "FL's mission completion in the novel world in order to leave it "

Dissimilarity:
1) night of love doesn't offer the entry of original writer in the story whereas PFIL has the orginal writer playing as FL so she knows pretty much the entire plot
2) night of love is love story between vamp and villain ..please fall in love is love story between ML and side character

Both felt very similar, both revolve around the simple idea of love, building yourself and your dreams and whether you can have both

The story is focused mostly on the main couple. There's no other subplots (like detective, etc) that interferes with the story, just romance. Generally, a really fun and consistent watch.

Both are cute dramas with a third-person narrator who explains what the characters are thinking in a quirky, almost cartoonish way.
Dreaming of a Freaking Fairytale: miniseries, fluffy, romantic, focuses on the main couple with little to no information about side characters
Salon de Nabi: focuses on the main character overcoming social anxiety, romance is a side plot, side characters have their own storylines, tackles serious issues

The dramas are very different, but I'd recommend Salon de Nabi if you liked the narrator concept in Dreaming of a Freaking Fairytale.

it have the theme of 'monsters' invading and taking over 2 innocent individuals that is set out to save everyone

Both series explore the relationship between a gay and straight men, where gay character accepts their own sexuality and is willing to fall in love and form a wholesome relationship, while straight one has his doubts and internal conflict all the way through their relationship.
Both stories begin with straight character being clueless about gay man's sexuality and assumes that gay man should be very popular with women, since he is very good looking. Straight character is super unlucky with women.
Even after they clearly formed a very loving feelings towards each other and strated their relationship as a couple, straight character has troubles accepting the fact that he is with a gay man, of what people around think, and most of all the physicality of their relationship. Straight character avoids sex as much as possible, while gay character is very sexually active. Gay character is also very gentle and loving, while straight one is rough and rude, and offensive and many times unfair towards his partner and can't get past his internal conflict. Gay character is also very patient and super forgiving.

Both tsuiraku jk to haijin kyoshi and sensei sayonara has the same teacher-student relationship setup with deeper meaning. Students who becomes the reason of healing for the teacher and teacher who helps the student to decide on a path of their future.

There are three male leads in Lost You Forever. I think watchers will enjoy watching The Princess Royal as well.

Both are:
+Female-centric
+Reverse Harem (Multiple MLs)

ML in TMWTCR is King who want to gather power so can make peaceful life in country especially to FL. His personality is kinda like CX.
SML is a villain with two different personality, Which he use his different identities to trick others and run his plans. His personality and love story is kinda like XL.
TML is FL's bodyguard with unspoken feeling who is always around FL.

Both are:
+Female-centric
+Reverse Harem (Multiple MLs)

ML in TMWTCR is King who want to gather power so can make peaceful life in country especially to FL. His personality is kinda like CX.
SML is a villain with two different personality, Which he use his different identities to trick others and run his plans. His personality and love story is kinda like XL.
TML is FL's bodyguard with unspoken feeling who is always around FL.

the plot line sounds the same and I first thought the Japanese version was the prequel but its actually adapted from manga and the Korean one is from a webtoon.

In both series, the interaction between a younger and older man in the field of justice is the central theme( auditors in one series, attorneys in the other). Both operate in an ill-designed system where defeating criminals requires cunning—and maybe more than that. The elder is an expert in his profession, but his techniques and his demeanor is more hard and cynical, while the younger ml has a "good and pure" heart but is a naive while being intelligent as well. The two's interaction alters and tests them. Both dramas give off very similar vibes