-Both Taiwanese dramas are lead by some of the most handsome actors ever.
-Actor Michael Zhang appear in both of these dramas about basketball.

-The story in both dramas have the same stepbrother plot between the main couples, as well as a fujoshi.
-In 'HIStory 1', both stepbrothers met when they were grown ups already, one of them is a celebrity.
-While in 'HIStory 4', both stepbrothers met when they were still young, one of them fell in love with the older stepbrother.

-Chris Wu's roles were pretty much similar; he stars in "The World Between Us" as a lawyer; while he's a prosecutor in "Copycat Killer".
-Some of the characters in both dramas also work in a news TV channel.
-The similarity of both dramas' story is that they were looking for the mastermind behind the crime.
-Same number of episodes per drama (10 eps. each)

Both Korean dramas tell the story of friendship between 3 girls and their stories of romance & career. The ages of "20th Century Boy and Girl" main female characters were 35 years old. While "Thirty Nine" were aged 39 (obviously).

These 2 dramas both have a similarity, about 3 girls who were best friends, and their stories of their career, romance & friendship. "Thirty Nine" is a Korean drama whose characters were on the verge of becoming 40. While "Fabulous 30" is a Taiwanese drama whose characters were on the verge of becoming 30.

The 2nd season of "Sister Who Make Waves" stars Rainie Yang, Cecilia Cheung, Joey Yung, Michelle Chen, and many more legendary female celebrities competing for the show. Although "Call Me By Fire" is only on its first season yet, but it has great names like Jerry Yan, Owodog Zhuang, Julian Cheung, and many more legendary male celebrities!

"Sisters Who Make Waves" is a Chinese show competition that stars veteran female celebrities performing on stage through their singing and dancing talents, while "Call Me By Fire" is for veteran male celebrities.

-Same genres (comedy, travel, friendship, life)
-Lee Seung Gi's personality and looks never changed in many years
-Both shows give lots of laughter, very funny and enjoyable!

Same genre (comedy, investigative); lead actress Lee Sun Bin appeared on both dramas playing almost similar roles as part of a team investigating.