They might be not that similar in plot and story, but have a similar feel to them.
There are many crazy/funny moments in both on the one hand, and at times they get really dark and thrilling on the other hand.
In both dramas the main antagonist is a psychopath.
And in both there are some funny scenes with gangsters, who look tough at first, but turn out to be softies actually and respect the main characters (ML from PD, and FL from SWDBS), after they get beaten by them.
There are many crazy/funny moments in both on the one hand, and at times they get really dark and thrilling on the other hand.
In both dramas the main antagonist is a psychopath.
And in both there are some funny scenes with gangsters, who look tough at first, but turn out to be softies actually and respect the main characters (ML from PD, and FL from SWDBS), after they get beaten by them.
The comedy reminds me of Strong Woman and it has the same kind of ridiculous moments that would never happen in real life, but are super hilarious to watch. The two shows are cheesy, but incredibly funny and entertaining. They both have the employee and boss relationship that ends up as a romance. There is a nice love triangle and those fun sound effects as well. They are both comedy and romance with some mystery. Not to mention, there's a rich male lead!
I haven't finished Rookie Historian yet (I'm currently binge watching), but I can see some similarities in the male leads personalities. Both are imperfect in the sense that some dramas tend to make de ML good at everything, and both are like giggling school girls after interactions with the FL. Both female leads are also strong women with strong personalities.