Both main leads go through character growth that make you fall in love with them. All the main characters bring out empathy from the watchers. They both deal with court/law. Lee Jong Suk and Park Shi Hoo's characters lean more to the anti-hero side then the hero side, straddling the line between dark and light. Both will get you hooked once your past the first episode.

While the stories have NOTHING in common, the shows remind me of each other because they both had low budgets and yet they have been among the best I have seen.. They knew how to direct their stories to keep the audience captivated.

I feel like the family situations in these dramas are very similar.
Also the love lines resemble each other.
There's also a hint of mystery and crime solving in each where the hero acts in the same way though not through the same methods.

-two groups that initially don't like each other and have to come together
-Both leads are "leaders" of said groups
-Romance(?) between the leads, the quirky and witchy characters, and the teachers
-cute, quirky male (N and Minhyuk)
-The female leads are the same, strong and independent but know when to turn for help and want to do the right thing
-witchy female character (Hee Joo and Soo Ah)
-Teachers who try their best to support the students and their dreams
-same type of drama goes on in both like the cancellation of the goals of the combined teams and teacher complications

-They have the same type of feel to them when watching them
-Both lead girls get pregnant
-Both have annoying family members that like to scream and hit the female lead
-There is a focus on family, not just romance

-Poor Female Leads
-Rich Male Leads in a position of power
-Contract Romance and Marriage
-Cohabitation
-Male Lead has girlfriend in the beginning that the Female Lead "ruins" by events out of anyones control
-Sweet Second Male Lead
-The Second Female Lead and First Male Lead try to continue a relationship before guilt for the Female Lead gets in the way for the Male Lead
-Annoying Time Jump