They both give off a similar feeling. I find resemblances between ji woon and hanazawa rui, but also between hyun min and domyouji. The storyline is somewhat similar as well.

They both give off a terribly similar feeling! Not only the characters, but also the story line so far.

Both revolve around ghosts and also a starstruck love story between a human and a ghost. Right now I am watching Bring it on, ghost and it just brings back a lot of memories from Oh my ghost! I totally recommend it to fans of bring it on, ghost.

Edit: I forgot to note this but a friendly user reminded me of it. We also have Kang Ki Young who features in both dramas as the comic relief (and this alone is a reason to watch Bring it on, ghost).