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iPod touch 4G speed, camera, display measured against iPhone 4

Apple's latest iPod touch update has been given a direct comparison to the iPhone 4, with new videos that demonstrate the speed, display, and video-taking quality of each device.

A trio of videos were posted this week by, which compare the iPhone 4 and fourth-generation iPod touch, as well as the iPhone 3GS and iPad. The iPhone 4, latest iPod touch and iPad all sport Apple's custom A4 processor, though the iPhone 4 has twice the RAM as the 256MB found in the iPod touch and iPad.

But in a comparison of startup times, the iPad was the clear winner, with a full startup achieved in just 19.04 seconds. Next was the fourth-generation iPod touch, which took 26.40 seconds to start, followed by the iPhone 4 at 28.64 seconds. Last year's iPhone 3GS started in 32.80 seconds.

A side-by-side comparison of the 720p video cameras on both the iPhone 4 and fourth-generation iPod touch was also conducted. In the videos, the iPod touch camera has a darker contrast than the video shot with the iPhone 4.

Finally, the most obvious disparity between the two devices is the display. Though the new iPod touch packs a high-resolution "Retina Display" packing the same 326 pixels per inch as the iPhone 4, the iPod touch screen does not have the same in-plane switching technology found in Apple's smartphone.

When viewed from sharp angles, the iPod touch display has distorted colors, while the iPhone 4 remains accurate. This is thanks to the IPS technology in the LCD display.

IPS technology was developed by Hitachi in 1996 to improve viewing angles and color reproductions on screens. Its first appearance in Apple's line of iOS devices came earlier this year, when the iPad was introduced.