they seem to have the same kind of vibe and a feeling of unconditional warmth and love
the main leads have some similarities like the FL of YMG is an actress while in LMLMV , ML is a dubbing actor, also the plot in both the dramas is so beautiful and wholesome.

similar vibes ,
both related to music
have amazing OSTs
leaves a lasting impression

The endings are different though
The best story has more of an open ending and is shorter in terms of duration
best story is Thai BL while sing my crush is a korean BL

Same type of setting - the characters inside the comic world
Miss Ye in Wonderland is longer and has more of a complex story.