Both dramas are about self-growth and family. The stories are very unique, memorable and entertaining. The differences are the main protagonist in Momikeshite is a guy and Kanna san is a woman. Momekeshite is way funnier and entertaining though while Kanna-san is a little bit more serious theme. Which is about a woman who was cheated by her husband, underestimated by people around her and try to focus on her dream.