In My Holo Love, instead of allergy for people with have face blindness; instead of falling in love with a robot, it's an hologram; there is a person who looks exactly like the hologram but with different personalities; there is danger and industrial espionage. There are more similarities, but it gets to the spoiler zone, so I'm not writing it here. My holo love is a great Korean drama that I really enjoyed watching and I highly recommend it.
The actress that plays the female lead is the same in both dramas. In Dear Herbal Lord, the female lead is the daughter of a doctor and the male lead is also a doctor. In this drama there's a kind of memory loss for both leads and also some kind of "double personality", as the body of the female lead becomes the home of two different souls.
The female leads of both dramas are doctors and, in both dramas, one of the leads has memory loss. Both dramas are also romantic comedies.
Both are short dramas where the female lead travels through time to the past and ends up into a love/hate relationship with the male lead.
The sequel of When the son is off, but the story is not the same. It's also a time travel/forced marriage short drama.
They are both short dramas of time travel with a forced marriage. Tha female lead and the male lead have a really bad relationship at first and spend a long time trying to fool each other.
Both stories start with a contract between the main characters agreeing to be brother and sister. Both are also Chinese historical romantic comedies.
Light historical romance with a little bit of comedy. In both dramas the female lead helps the male lead with his cosmetics shop.