Here is another video i found on Youtube and this one is also from the same user, in this video pocketpc has compared the hardware and designs of iPhone 4, HTC Desire HD and HTC Desire Z. This video might be helpful if you are confused between the three phones and don’t know which one to buy (provided you are only concerned with the outer looks of the phone).
Both HTC phones have larger screen than the iPhone 4, HTC Desire HD just like Evo 4G is a larger phone than the other two but also has a bigger display whereas Desire Z sports a slider phone lacked by the other two listed. iPhone 4 has a retina display, is smaller in size and easy to carry. Watch the video comparison embedded above to get a better idea of the hardware for the phones listed.
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