Both movies have the same vibe. Although Han Gong Ju is filmed more darker, Dogami has the same 'based on reality'-topic. Both are 'watch one time only' movies and I found Dogani more difficult to watch. (still wanna cry)
They both deal with with traumatic experiences. Gong Ju is a bit darker and a lot less hopeful, but they really open your eyes to how unfair reality can be. I think that everyone should watch these. CMASR is a beautiful movie, the special friendship between Sen Xi and Yi Yao is really really amazing.