Answer:
The third person perspective allows readers to connect as an outside audience.
Explanation:
Granted I might be missing some information due to the nature of your question.
Answer: I've never heard of the first story and you didn't provide the author so I couldn't find it. However, the narrator of "The Tell-Tale Heart" is very paranoid and frightened, but also impulsive throughout the story. It creates a fearful and tense mood to the story that may not have been there if it was narrated by a more confident person.
