Final answer:
The main difference between Miss Peecher and Mr. Headstone is that she has feelings for him which are not reciprocated, creating a dynamic of unrequited love.
Step-by-step explanation:
The principal contrast between the characters of Miss Peecher and Mr. Headstone is that she loves him, while he does not love her.
This unrequited love is a common theme in literature and highlights the emotional imbalance in their relationship.
Despite Miss Peecher's feelings, Mr. Headstone may be oblivious, indifferent, or perhaps focused on other matters, which can deepen the readers' understanding of the complexity and tragedy of her character's experience.