These dramas both have Nishiuchi Mariya and it shows two completely different personalities by the same person. ( Even if it might not be the real person... if that makes sense.)
Both have the same sense of humour and over the top characters, so if you liked one, I'm pretty sure you'll also like the other.
Both these Japanese dramas are romantic comedy adaptations of popular mangas that focus around a school club. The same actors plays the male leads in both the dramal with both characters being over dramatic in their mannerisms, and fall in love with the female lead from the very beginning but is oblivious. The female characters though played by different actresses have the same personalties of being lonely school nerd until they meet the male lead and then they start to change. As well the girl is also completely oblivious towards her feeling for the male lead.