Both dramas are about not so good students getting into a well known college. When I first saw Dragon Sakura I automatically thought about God of Study
Sakuragi Kenji is a destitute lawyer and one-time member of a motorcycle gang trying to guide failing high school students with an average score of 36 into Japan's most prestigious educational institution, Tokyo University (Toudai). For no other reason than Sakuragi's personal ambition, he has advertised his intention to produce 5 successful Toudai applicants from the students of a nearly bankrupt failure of school. In addition to revealing essential test-taking techniques for everyone who wants to know how to get into Toudai, "Dragon Zakura" will also teach the essentials of living one's life
I love this trope so much that I can watch countless dramas based on it even when they normally follow similar story structure. Weak student having no dreams whatsoever meets a teacher who help him/her rediscovering themselves and finding success at the end. Cinderella formula can be a little melodramatic compared to Dragonzakura But both have strong motivational story. Well in dragon zakura too, we see many unexpected things happening in last 2 episodes rather than simply following the story and getting result. I loved both of the dramas and have rated them same. So basically they are on same level for me, You give it a try and decide yourself.