Which on do you think is better in terms of overall sound quality? Soundmagic E50 or Sennheiser CX 5.00?

Hi! Great review but I have a question, will the 5.00G work with an iphone? Cause my sister has the G version and she's planning to upgrade, and give the CX's to me. I can't test if they work because she's away.   Also if they don't work, how does the 5.00 compare to the soundmagic e50? I had...