Both dramas are high school teen stories with love triangles and high school drama. While Failing in Love is a more coming of age story with a little more realism doing a great job in portraying the complexity of being a teenager. Best Mistake is a more fluffy, fun to watch and doesn't really have a deeper message but it is nice to binge-watch.
Best Mistake (2019)
Similars
Not that these two shows are super similar but they take place in the same universe.
Although Light On Me first shows up in season 3 of Best Mistake, you need to have seen all the 2 prior seasons, of Best Mistake, to understand most season 3. Because of that, I recommend you start with Best Mistake season 1.
Also both
Takes place in a school
Are about young people finding their identities/themselves
Even though the concept is different and the stories are diffrent they are high school dramas.They gave me similar vibes and i was reminded of it. if you like live on you will love best mistake or vice-versa
Best mistake might be not similar to user not found. But WHYNOT fans should watch this! Best mistaks have 3 seasons so far and will be out the new season soon in this december ! Its worth watching. Goodluck and have fun!