Apple always touts faster, better processing systems for every new iPhone it releases, and this video puts the iPhone 5S to the test against the 5C, 5, 4S, 4, 3GS, 3G and 2G. YouTube user EverythingApplePro lined up the seven phones and demonstrated the speed with which the phones turn on, turn off, open apps and access websites.
Ultimately, the 5S wins out, but the results of the separate tests may surprise you: iOS 7 may not be all it's cracked up to be. Watch the demo to see if it's really worth upgrading for speed alone. Aesthetics and cool factor aside, you may find it's more practical to buy an older model.