Even so, imagine Methods!Granger fleeing to the bathroom after just hearing Ron call her a nightmare. That could've happened in Ch. 9, maybe, but by this point Granger has been fighting older bullies successfully and you'd be, like, "Yeah right."

Wait wait wait. Just hearing Ron call her a nightmare? That's not at all why Hermione is crying! Hermione is crying because:

1. She's a muggleborn.
2. She has no friends.
3. Everyone knows she has no friends.
4. No one has decided to befriend her, even though they know that she doesn't have friends.

Hermione realizes that her best isn't good enough. It doesn't matter that she's good at magic; she's a muggleborn. It doesn't matter that she's helpful; other people don't like her despite her good intentions. It doesn't matter that she's hurting; other people don't care. And so a homesick little girl hides her frustration and pain in the bathroom.

In Methods, the same comment will have a different effect because the reality on the ground is different.

Beyond that, how one responds to social and combat situations is often different; one can easily develop strength in one without strength in the other.