I found that their poets compares the poem with something else
It sounds like you noticed a similarity between them. Write a sentence about it, and then add a sentence to explain what you mean. Then add a sentence with an example. That will make a whole paragraph, and you can let it be paragraph two... Know what I mean? Whatever you are referring to with this sentence..."their poets compares the poem with something else"... explain it in a paragraph, and let it be paragraph 2.
When you have mustered a paragraph, the next one will be easier.
What is the main idea of the first poem? What is the main idea of the second poem? If you identify the main idea of each, can you see any similarity between them? If not, can you see a difference between them?
If it is hard to determine the main idea of each poem, google the name of the poem with the word "analysis" and you will find some great discussions of each poem.
:-)
