Poisonous Passion is similar to Raeng Ngao :
-Tragic Past
-Femal lead back to revenge
-Double identity

Fai Chon Saeng is similar to Raeng Ngao :
-Twin sisters
-One weak sister
-One strong sister
-One died, one survives
-Revenge theme

Bad Romeo is similar to My Secret Romance :
-One night love at first meeting
-Love scene in car luxury car
-ML and FL separation for years
-Romance

My Secret Romance is similar to Tawan Tor Saeng :
-Rich and lonely rich male lead
-Cute female lead
-Boss / employee relationship
-ML loneliness heal by the ML frienship
-ML falls in love with FL
-ML missing mother / separated from childhood

Anguished Love is similar to Klin Kasalong :
-Same historical period : Rama VI
-Forbidden love
-FL suffered in past life and was killed
-FL became a ghost in the new life and take revenge on ML

Torranee Ni Nee Krai Krong similar is to To Me, It's Simply You:
-Same Male Lead
-Farm war topic
-Hate to love relationship

Duang Jai Akkanee is similar to To Me, It's Simply You :
-Same male lead
-Agriculture topic
-Hate to love relationship

Ruen Roi Ruk is similar to Reuan Saneha :
-Same main actress (Bee) as main wife
-Black trick
-Tragic end

Rai Rissaya is similar to Poisonous Passion :
-Weal femal lead
-Femal lead murder
-Femal lead survives and becomes stronger
-Femal lead takes revenge

Klin Kaew Klang Jai is similar to Look Ruk Look Chung :
-Baby exchange at birth
-Poor mother vs Rich mother
-Sad girl vs Spoiled girl

Rak Leh Saneh Luang is similar to Lom Son Rak:
-Twin brothers
-2 couples
-Fake brother identity plot

Sakul Ga is similar to Kaew Lorm Petch :
-Same grandmother
-Poor female lead becomes a rich heir and knows her true identity