Answer:
Both of them use personification as some form of the key element of the story, usually utilizing the personalized figure as the main character or speaker. We can see that in Sylva Plath's "Mirror," the mirror itself is the speaker and the story teller of the entire situation. We can see that it is talking about a completely different person. With "Overheard over S.E. Asia" by Denise Levertov, we see that the speaker is a napalm bomb, which is an explosive device that incinerate's everything in its path. At first we have to use more implicit details to determine that it is a napalm bomb, whereas with the mirror, we know that it is a mirror. It's not till closer to the halfway point of the poem that we can determine it's a napalm, in which case instead of describing someone else, it simply goes about talking how it destroys everyone, regardless of who they are.