Both have a female pretending to be a male. The main difference is the reason why she is disguising herself. There is a love connection, super confused guy trying to figure out if and how he could be attracted to another guy when he thought he was straight and working his way through that. This drama also has a bit more adult humor and romantic scenes so it's almost like Hana Kimi is the kids version (an awesome kids version might I add) and Coffee Prince is the teenage version.

Both involve a rich guy and a poor girl. The guys mother disapproves and does everything she can to break them up. There is an attractive supporting male who catches the lead females attention and causes her to question her relationship with the main rich guy. The main guy learns how to act like a decent human being thanks to the main girl.

Small things like that.

It's the Taiwanese version of HYD. Not as good but if you want to watch every version of this show then this is a must!