Similarlies:
-drunk and married to a stranger
- heart broken and rejected on the same day
-had a one night stand by accident
-male lead loves the female lead first
-she tried to avoid him and the situation
-they accept who they are in returns
-both main cast tried to keep their secret in
-both was cheated on and off by their exes
-both main lead has very good chemistry

Differences :
-one has alots of evil people
-one deals with single parenting family trauma
trauma
-Male lead gets jealous all the time
-female lead has so much haters that turn her down
-one deals with female leads struggling as a business women
~Hope's this helps~

Both male and female lead are good looking and they match well in the chemistry. The female lead are doctors or pharmacists in ancient times and their main goal is to cure the prince's illness. Both female lead was force to marry the male lead and was confused about their identity. Male lead always saves female lead and was faithful to the female lead the whole entire drama or I would say he's loyal in NOT wanting another consort/2nd wife.

First of all I would say these 2 dramas are short and they jump straight to conclusions. And obviously I think that the drama should be extended to more episodes because there are many left out points in the male and female romances. These 2 dramas should have more Official Soundtracks to enhance the drama so the drama would be more interesting. And finally all I gotta say is that the drama at the end does not have a happy ending in my case because the female lead was left alone or there should be Season 2 explaining more. The main question is "did they really end up together?"

Both the main male lead dislike the female lead at first but slowly develop feelings for her after they overcome so many obstacles. Main female lead came from another different dimension/timeline but was absorbed to a different era to meet the male lead. Both drama are somehow short and very straightforward about the climax. These 2 drama has the same emotionally feelings after watching it. Both drama also seems to have season 2 because the ending was cut short and needs more explanation in the overall drama.
Some differences I spot in these drama is that one has more Official soundtracks than the other and one is more emotionally sad in the middle. The drama Unique Lady has 5-6 soundtracks and sad in the climax compare to Princess at Large, there is only 2-3 tracks also the climax is not sad. And finally came to realize that in Princess at large the female lead meets the male lead in her dimension while Unique lady, they never show any presence time in modern clothing making the storyline mysterious. But hopefully there really is season 2 of these dramas. ?

The male lead has a trust issue with female lead. Female lead was naggy and somehow a troublemaker. Most importantly all the male characters are good looking and would not waste your time if your interests in multiple personalities men. And most importantly I would say that these 2 dramas are short and very straightforward to the point. And finally these 2 drama just gives me the same sentimental mixed emotions and very unique storyline.

Female lead is a twin sister while one is nice and the other is mean or is a player. Main male lead was always suspicious about female leads orgin. Main male lead was always curious about female lead might be having amnesia or lying to people. Nice female lead was always telling the truth and people though she was lying. The 2nd main male lead believed that he love the right women.

Both Male lead had exceptional super powers and capabilities. Female lead just always cross path with Male leads and needs his help. Slowly loving and trusting each other.

Both took place in the Republican era of war. Female lead was smart and honest with her feelings the whole time. Male lead fell in love with the lady first and expresses his love for her. Love and hate was the relationship but they gradually learn to appreciate life.

Blind main female lead who tries hard to remember her past and live well in the future but felt so much pain and was curious about the truth. Main Male lead was trying to help but at the same time, wanting her to move on.

Both female lead are switch and the chemistry went so well. The main Male lead was confused the whole time and tried to find out the truth.

One of the protagonist enter a different dimension where they end up causing trouble but found love. The female lead was always whining and cunning towards the male lead.

Both female lead are funny and humorous. Both travel back in time & fall in love with the prince. The female lead is very stubborn and always tries to finds a way out of palace. Female lead gets to be Male lead's consort. Male lead is always serious and doesn't like female lead at first. Male lead always tries to torture her and makes her jealous.