The actresses were very similar as well as the female leads. Both are very optistic, enduring, and loyal people who fall in love at first sight with an aloof male lead. Both dramas have happy endings. The male leads are similar as well. Extremely intelligent, irritated by the crushes their female leads have on them, and with cold personalities.
The main characters in both fall for each other pretty early on and support each other. The male leads are both completely devoted to their female leads in a way that is very endearing.