I searched the poem and song lyric and after reading both, Stereo Hear by Gym Class Heroes and A red, Red Rose by Robert Burns, I can compare and contrast this way:
COMPARING
• Both authors use the exaggeration technique to make emphasis on the intensity of their love.
• Both apply a combination of metaphor and simile in their lines.
• Both main characters of the song and poem are men talking to the woman they are in love with.
• Both are focusing on only one woman and not love in general.
CONTRASTING
• Stereo heart compares his heart to a stereo, explaining the way he loves and how nature it is while the Poem, A red red rose describes how he will love his lady till the end.
• Robert Burns in the poem is revealing/saying something to his lady while in the song, the author is mostly asking questions about what the woman will do.
