![](https://i.mydramalist.com/YYk3Pt.jpg)
![](https://i.mydramalist.com/vNoVpt.jpg)
Both characters have doppelgangers.Both are melodramas that are a little dark.
![](https://i.mydramalist.com/6pLePt.jpg)
![](https://i.mydramalist.com/MAmoXt.jpg)
Both are revenge dramas, and both deal with very mature subject matter. Qoa, death of a child, missing you deals with rape and other really touchy issues.
![](https://i.mydramalist.com/MAmoXt.jpg)
![](https://i.mydramalist.com/o7D8kt.jpg)
I watched secret first and it's one of my favorite revenge dramas, but I have never seen such a blood boiling drama in all my life as QOA.
![](https://i.mydramalist.com/MAmoXt.jpg)
![](https://i.mydramalist.com/WPB3lt.jpg)
Both have KSW and both are great love stories. However, bad love doesn't have the same hatred. Lol