(Translated by https://www.hiragana.jp/)
Apple - iPhone 4 - Video calls, multitasking, HD video, and more
The Wayback Machine - https://web.archive.org/web/20110609202018/http://www.apple.com:80/iphone/

iPhone

iPhone 4
Retina display

Only iPhone has the Retina display, the highest-resolution screen on a phone.

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iPod and iTunes

Only iPhone has an iPod and iTunes built in.

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App Store

Only iPhone gives you one-tap access to the world’s largest collection of mobile apps.

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