Shakespeare's Mistress' Eyes (Materiality)

Shakespeare in his sonnet, "My Mistress' Eyes," talks about how his mistress' eyes are nothing like the sun.  He uses many different analogies to compare certain things.  His diction is different than most writers in the world today.  When comparing Billy Collins' "Litany" piece to Shakespeare's poem, I'd say that, in a way, they are similar.  Both poets use sarcasm in their poems to emphasizes certain lines.  Collins' use of diction is a tad more modern than that of Shakespeare's as well.  How both authors describe their poems and use powerful words is what makes them similar poets.