-Visuals
-Leads are deskmates
-Parents of leads are close
-Female lead redos one year and wishes to enter the same university as male lead
-the interactions are soooo sweet
-Healthy relationship with misunderstandings that get resolved pretty quickly although I prefer TAHAJR’s college setting more than OS.
-Male lead is sweet and caring

Similarities:
-Both leads are crushing on each other
-Female lead chooses a college major that she doesn’t like just to remain close to the male lead
- Setting occurs from high school to college (along with after college)
-Male lead jealous moments are really cute
-The second leads are good pairings
-You do get a bit of second lead syndrome but not for very long

Both I highly recommend (good endings as well)

They both involve the female lead hiding their secret identity. The male lead isn't arrogant and is quite sweet. Both female leads aren't your typical fair ladies during the time. They are good at martial arts. The female leads face an identity exposure which leads to imprisonment. There also isn't any second lead syndrome in both dramas. There are similar political ties between the two dramas. Lastly, there are funny parts and serious parts, it's worth a watch.