Why do people compare these two so much? They are nothing alike.
Onodera the stereotypical perfect girl the protagonist admires from afar.
Megumi the stereo... no. Completely unique. The girl NO ONE notices except the main character "sometimes" but has the best reactions, and is the most down to earth.
I honestly don't understand either OP.
i prefer considering megumi as being setsuna done wrong
she lost that slightly crazy charm and became more reminiscent of 3dpd