Jiao Yue Liu Huo (2024)

Both are mini dramas with a similar vibe, with the FLs thought of as evil and the MLs subservient to them but powerful fighters.

Fantasy action melodrama with romance
Immortals
Supernatural beings
Falling in love
Intense
Action packed

Historical period prices with supernatural and fantasy Elements
Action packed
Both are Chinese dramas
Romance

Secrets of the Shadow Sect is basically My Journey to You reversed and focused on the secondary couple.

Both are historical mini dramas with a subservient and secretive bodyguard ML and a domineering FL. Both dramas have a similar vibe.

Spy and "secret" group. The killer is Also Romantic is more comical. Both are also a short-episodic drama.

Both are historical mini dramas with a secretive, submissive ML and a domineering and powerful FL. Both have shadowy sects and schemes.

Similar:
Must escape big bad enemy
Action packed
Identity plays a role in the story
Dark

Different:
Mainly about male lead
More romance oriented

Both are historical dramas with reversed gender roles with a strong FL and the ML who is her servant and has a secret identity/motivations.

Both are mini dramas in which the ML has a secret identity/connection to a rival sect. Both FLs are thought of as devils involved with many men, and the MLs are brought as their concubines.