both dramas are about teens and high school life and the characters are very similar ~ the main female character is not human but a vampire/ an angel, then there's the most popular boy in the class who falls for her, the bad girl who likes him and another handsome boy who falls for the main good girl ~

both are about a woman who has to choose between her ex boyfriend/husband and a new man

the main female characters resemble each other a lot; both are cute, innocent and silly; both are mystic creatures (angel/gumiho) who have to learn how to live in the human world.

in both dramas the main character wants to get revenge on those who killed their parents; they give you the same feeling, because both have suspense, action, romance, tragic events and funny scenes ^^

Both are romantic comedies in which the main male character falls in love with a woman who is older than him.

Both are melodramas in which the female lead is blind ~ but in Angel Eyes Soo Wan was blind just when she was younger.

Both are melodramas in which the main characters first meet in their teenage years, being each other's first love, then they get separated because of some tragic events and meet again after years.