The best description of the difference in the way first-person point of view is used in “The Tell Tale Heart” by Edgar Allan Poe and “Longing” by Paul Laurence Dunbar is:
In “The Tell Tale Heart,” the first-person point of view shows the main character’s descent into madness, while in “Longing,” it shows the speaker’s yearning for their loved one.
This choice captures how the first-person narrative in Poe's story provides an intimate look at the narrator's unstable mental state, while Dunbar's poem reflects a deep emotional longing from a personal perspective.