iPod Touch 16Gb Vs. iPod Touch 32Gb

First Generation

Weighing 4.2 oz., the first-generation 16 GB/32 GB -- debuting on Sept. 5, 2007 -- measured 4.3 inches in height, 2.4 inches in width and 0.31 inches in depth. Besides its defining touchscreen feature, the iPod Touch includes the USB-compliant dock connector, just like the other iPod versions produced at the time: the iPod Classic and iPod Nano. Compatible for syncing with personal computer operating systems no older than Mac OS 10.4 and Microsoft Windows XP, the first-gen Touch had a battery that could withstand up to 22 hours of audio playback and five hours of video playback.

With the debut of the second-generation iPod Touch 16 GB/32 GB on Sept. 9, 2008, the portable player's depth grew by 0.02 inches, although it is a little lighter at 4.1 oz. Apple increased audio and video playback by 14 hours and one hour, respectively. Like the first-gen devices, the second-generational iPod Touch uses the International Electrical and Electronics Engineers' 802.11b/g pair of standards for wireless networking. However, portable players running Apple's iOS 3.0 mobile operating system received Bluetooth 2.1 connectivity as well. Apple also introduced volume buttons with this generation.

For the third generation of production for the iPod Touch, which began on Sept. 9, 2009, Apple doubled the device's 128 megabytes of dynamic random-access memory, replaced the PowerVR MBX Lite graphics processor with the PowerVR SGX, and ditched the 620-megahertz ARM11 processor for the faster 833-MHz ARM Cortex-A8. The company also introduced voice control to the device. However, the length of audio playback time fell by six hours. This also marked the end of production of the 16 GB iPod Touch.

At the time of publication, the current iteration of the iPod Touch 32 GB -- which stands between the 8 GB and 64 GB -- weighs 3.6 oz, which is the lightest it has ever been. Its physical measurements consist of 4.4 inches in height, 2.3 inches in width and 0.28 inches in depth. Apple has enhanced the 3.5-inch touchscreen -- which used to produce a 320-by-480-pixel resolution at 163 pixels per inch with 18-bit color depth -- to generate a 960-by-640-pixel resolution at 326 ppi with 24-bit color depth. Wireless connectivity now comprises an IEEE 802.11/b/g/n trio of standards, the processor is a one-gigahertz ARM Cortex-A8, and audio and video playback time is boosted to 40 hours and 7 hours, respectively.