Recommendations

Both legal dramas.
Both feature a mentor/mentee dynamic between female lead and an older (middle aged) female boss.
The middle aged woman goes through a divorce and has a child with ex.
Female centric, slight romance.

Both of this are quite similar in the killing aspects. One of the main characters in both shows are a killer/murderer. They kill for a good cause. That's the only similarities between the shows, nothing else.

Both the main genre of zombies, layered in story of humanity and conspirocies between characters. The story behind the infectation is well-explained and thought-out.

Both are Thai BL dramas that explore themes of reincarnation, with one male lead who was female in a past life. Both also feature supernatural elements, such as shamans or shrine deities.

Both are Thai BL series that tackle heavier themes. Male leads were lovers in a past life and reunite in the present. Both stories explore the theme of reincarnation.

Both are light hearted Thai BLs featuring the classic enemies-to-lovers trope with the male leads that have “hated” each other for most of their lives.
In both dramas, the more playful/laid back ML (Pat/J) constantly teases and provokes the more serious and upright ML (Pran/Jinn).

In both the ML get the job to protect the FL. The first as soldiere the other is ex-soldiere.
In both dramas, FL and ML get to know each other better and fall in love. But there are a few obstacles in there way to happiness.

If you like bodyguard dramas watch both.

In both the sister swap their marriage.
In one drama the groom is a general in the other a reckless prince.
In both dramas the new married main Lead couple have to work together to find their best ending.

-sexless married couple who tried to find spark again
-involved cheating
-genre wise is not similar but the main point is similar

- Poster looks similar and if you will notice the official posters of the two, both have a mysterious character being blocked by the NTV Logo (The poster for the right to judge here in mdl is an another version of the official poster)
- Plot is kinda similar with a mysterious killer/killers lurking around
- Both have catchy openings

both have leads that are "running away "
both have similar vibes i.e dark comedy, quirky editing quick progression of plot
they both involve the female lead running away and the male lead helping her
both involve playful banter between the two leads
very similar to each other.

It is the first season while the other is the third season. They both have the same ml and Strange Tales of Tang Dynasty 3: To Changan is the part of Strange Tales of Tang Dynasty

Similiarities:
- Both Thai Dramas
- Both BL Dramas
- Sorn (My Stubborn) and Joke (Hidden Agenda) help the other ml with dating advice
- Both Romance Dramas
- Friends with Benefits dynamic

Diffrences:
- My Stubborn is office based
- Hidden Agends is school based
- My Stubborn starts with Sorn hating the idea of dating anyone younger, like Jun
- Hidden Agenda starts with Joke helping Zo pursue his crush, even though Joke has a secret crush on him
- My Stubborn has a noticeable age gap between the leads
- Hidden Agenda doesn't seem to have a huge age gap compared to the ml's in My Stubborn

Both have somebody that run's an establishment (FoS is a Hotel, OoS is a Bar) in the modern world where they resolve a person's obsession from a past life

Both are a bit episodic going from 1 person to another but with an overarching story
Both have 1 of the leads as a demon hunter at some point
Both of the establishments are catered to monsters/demons

FoS uses time travel while OoS enters the person's dreams with a drink

FoS has a female lead and male lead with a romantic relationship, OoS has 2 male leads with a bromance

Both are japanese dramas about delinquents and include a lot of comedy. In Densetsu No Head Sho, an ordinary guy pretends to be a delinquent. In Nanba MG5, a delinquent pretends to be an ordinary guy.