Sennheiser CX 175 vs Sony MDR-EX450?

Hi. I'm going to buy a headphones, but I do not know which is better. I've heard Sennheiser, it was very nice with iPhone 5, but I found also Sony, but havn't heard yet. As I know, Sony has a case and microphone, but actually it doesn't matter. I just know, that Sennheiser has 16 Ω and Sony 40 Ω, that is interesting. What do you think about it?

Sennheiser hands down. Sony is good but nowhere near as good as Sennheiser.

In fairness I have not personally listened to Sony MDRs but the reviews are good. However, I own Sennheiser. I recommend Sennheiser they tend to be sonically balanced and proportional.

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