The Ghost Detective (2018)

Both shows have a ton of similarities:
> Have a subtle romance between the leads.
> In ZD the ML becomes a detective while in TGD the ML is already a detective. Regardless, they are both detectives who handle cases.
> ML dies at the start of the drama but they remain in the land of the living. Part of the drama focuses on them looking for the reason they died.
> The FL has street smarts which gets them hired by the ML.
> The FL is the first to find out the ML's secret.
> The ML must fight their instincts in order to remain "human". In ZD he must fight against eating other humans while in TGD he must fight against becoming a vengeful spirit.
> The 2ML is a detective who is in love with the FL.

It has the same concept of having supernatural beings (ghosts and vampires) investigate crime and law-related activities.

THE GHOST DETECTIVE IS SIMILAR TO VAMPIRE DETECTIVE BECAUSE BOTH SHOWS ARE RELATED TO SUPERNATURAL POWERS AND THE FEMALE LEAD TO CONNECTED TO MALE LEAD BECAUSE THE DEATH OF HIS BROTHER.

both are detective shows about the supernatural with ghosts involved. any more differentiating could be spoiler
but if you liked one you'd like to give the other a try.

A Ghost and a detective investigate a murder case that has a connection to them both.
The Ghost Detective focuses more on the ghost world while Two Cops leaves it a mystery.
Even though The Ghost Detective seems a bit darker both dramas have comedy.
Both have a little of ghost romance as well :)

I watched train first and then the ghost detective. I am surprised that no one thought the two were similar!
1- the lovestory itself. We know the leads love each other but the show does not make them state the obvious. As in they never declare their feelings to one another but we viewers know how much they love each other. In this way the romance is subtle and beautiful. It touches you deeply especially when you see how far the leads are willing to go for each other.
2- in both shows the leads overcome the impossible to be with one another. In train the ML finds the FL in another universe after her death and in the ghost detective the ML comes back as a ghost to the FL (none of these are spoilers)
3- the antagonists were similar too. Their origin stories, their descent to darkness was kinda similar to me and how it all came down to this question they kept asking

If you enjoyed one you will certainly enjoy the other. I know i did

Also a new intense supernatural/suspense drama! GD is about a ghost killing people and Guest is about a demon killing people, and they are hunting it in both dramas! If you like one, you def like the other one as well!

The Ghost Detective and Who Are You are both similar because they are about ghosts and detectives that deals with supernatural cases..

The Ghost Detective and Cheo Yong s1 &s2 are both similar because they are about ghosts and detectives that deals with supernatural cases..

The hero can see ghost and fight them. While investigating one girl ghost's death , they start working together and more...

Possessed is similar to The Ghost Detective its has those brutal killing, well the spirit and ghost not so much close but it has that in common and great actors with slight romance.

Crime meets supernatural. Many ghosts cases that get solved throughout the drama while our main leads deal with their own mysteries and troubles and a dash of complicated past.

They both deal about possession and evil spirits and the fight against them. They both have the exact same feeling.

Both are mystery/thriller/suspense shows with both female leads being able to see/sense spirits who is accompanied with a supernatural detective whether he is death himself, the grim reaper (black) or a simple detective who died and came back as a spirit (the ghost detective) if you like mystery/supernatural then these are the shows for you.

In both shows:
> The ML is adorable and a bit of a dork.
> The FL can protect herself in a fight (and the ML, for that matter!)
> One of the leads is reckless while the other is a bit more cool-headed.
> Both leads follow their moral compass, but one of the leads ends up stepping over the line in their search for justice.
> The leads work to stop a psychopathic serial killer.
> FL suffered a loss at the hands of the psychopath.
> Both share a similar issue/tragedy.
> There's a lovable team of misfits trying to stop a big threat.