The Grim Lover

Similarities:
- Death
- Fantasy
- Dramas
- Romance

Differences:
- Doom at Your Service has a straight couple
- The Grim Lover has a gay couple
- Doom at your Service is a South Korean Drama
- The Grim Lover is a Thailand Drama

Similarities: Both series are dark fantasy BL that focuses on a relationship in a supernatural setting and both series are being made by the same production company.

Differences: Completely different plot lines--Crow Club is a semi-anthology series with four different couples that focuses on the "crows" taking on odd jobs for humans where as Grim Lover is about a human and grim reaper solving a murder mystery together.

Similarities:
-- Thai BL dramas
-- A "grim reaper" character as a love interest.
-- A doctor/medical professional as the other love interest.

Differences:
-- I will have to see upon release of Grim Lover and update this section later :)