Please include some sample of eassay related questions of both fiction and non fiction reading and writing part of GCSE exams.
Something to remember with a comparison essay is that you will probably want to address what is different as well. You should establish what the two poems have in common and how that is shown in the poems with examples and analysis of the examples, but then subsequent paragraphs could discuss contrasts. While "Poem A" does (or shows, or means etc) . . . "Poem B" does (or shows, or means etc) . . .
As post one suggested, two poems from different cultures will be paired by similarities. Poems don't have to come from the same culture to have the same theme or tone. Look for what literary aspects these poems have in common rather than focusing on the culture they came out of. You might want to consider making your own study guide for each of the poems you have read in class. You might want to list generic information like title and author as well as the literary information like summary, theme, tone, structure, etc.