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
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.