Recommendations

Akunin and Ikari have a sort of slow and sprawling dark narrative that feels quite similar. Both with an emphasis on human nature and paying close attention to the cinematography and music. If you like the one, you'll probably like the other.

Tsumabuki Satoshi is in both of these as well.

both have ghost romance(in "Bring it on,ghost" the lead fall in love with a ghost)
both have murder cases

Scholar Who Walks The Night and The Emperor: Owner of the mask have similarities. Both story is developing the crown prince to become a great King.

It's because there is a cruel person/vampire that stand behind the Kings order and the Prince were forced to serve that person/vampire in order to keep his people save.

In The Emperor: Owner of The Mask there is Daemok. In Scholar Who Walks The Night there is a vampire called Gwi.

If you like kind a dark romance, something that's not only black & white - sometimes grey, when the male/female lead is only human and can made mistake - everyone made mistake and try to correct it, something psychological, steamy, smut and mature story. I think you can give KNH a try.
NB: there is too much of adult content, recommended for 17+ only.

Both start with the same plot of a humanoid robot to be the partner (taking care) of the main guy.

Both series are about vampire it also has
Action
Doctor
And the romance is good
But most importantly the main is totally hot

Both involve bringing justice for the people, and involve a bit of romance. Personally, both of the weak points in both of these dramas are the romance.

The two dramas have different dynamics. Emperor: Owner of the Mask involves the people & the palace versus the Pyungsoo group. Rebel: Thief Who Stole the People involves the rebels and the palace.

Both place the focus onto the main character who develops into a true leader.

Both have two universes connecting. Circle is about aliens or seems to be and W was about a comic book dimension.

Both dramas explore the impact of the past on an individual. While MSR focuses a lot more on the romance between the two leads, the other is much more touching and heartfelt in its message.

These dramas are very different overall. But both delve into the issues which blind individuals face, and also familial bonds and such. While Hyung is more of a story of acceptance, having hope and forgiving yourself, and moving on in life, Blind is a story of realisation, suspense and closure.

In both dramas, it feels like the female lead is really underappreciated for everything she does. They also both carry similar themes (lawyers, personal issues) and have romances which, although light at a first glance, have a deeper root. If you liked Prosecutor Princess, then Divorce Lawyer In Love might be even better, as the secondary characters also have better and deeper development than in PP.

Both funny and both have people who have to become parents suddenly

similar to fight my way in that they are long time friends entering into the adult world, leading to growth and change which includes feelings for one another from platonic to romantic when one gets into a new romantic relationship. hence the title.

long time friends who turn into lovers but not before denial and other factors coming in the way before they end up together. was a hit in Taiwan and if you love friends to lovers trope then this will be perfect to watch.

It's funny mixed with seriousness. Has a great story line and almost similar to Chief Kim. A humble man fighting for the rights of the unjust.