Both dramas circles around the AI or Technology theme.
Both deals with emotions in developing AI/robot

Both dramas have the "AI Technology" theme into it.
Both deal emotions in transforming AI into something like human.

Both female leads are dressed up as a guy.
Gender bender themed dramas.
Different style of using that specific genre

Both female leads are dressed up as a guy.
Gender bender themed dramas.
Different style of using that specific genre

Both female leads are dressed up as a guy.
Gender bender themed dramas.
Different style of using that specific genre

Both female leads are dressed up as a guy.
Gender bender themed dramas.
Different style of using that specific genre

Both female leads are dressed up as a guy.
Gender bender themed dramas.
Different style of using that specific genre

Both female leads are older than the male leads.
Both romance comedy genre.
Female leads are charming.

Both dramas are historical.
They have the same female lead that are fond of cooking.
Setting place is the palace.

Both set up in historical era.
The female lead is the one on the spotlight.
The main story revolves around the palace.

Both are documentaries that focuses on significant persons in a certain country. Difference is that Kingmaker is on politics while A Holy Betrayal is more on the religious type.

The same marriage of convenience trope.
Different attack on the same concept, and character wise really different.