Apple has released one iPad after another, but does it really matter which one we have? Is each new iPad that much better than its predecessor?

While the iPad has not necessarily undergone extremely overwhelming changes, it has improved noticeably over time. This can be seen in the way Mashable compared the latest tablet - the iPad Air - with the older iPads. Their video featured the iPad 1, 2, 3, and 4 lined up next to the iPad Air.

The first step was to turn on the tablets, which provided the first glimpse at how much better the iPad Air is compared to the rest. Most of the tablets took some time to turn out but the iPad Air turned on much faster than the rest.

The second test of the video was how fast the iPads could load a web page. This was one of the most anticipated tests considering that the new iPad Air features a brand new WiFi antenna to help expand the connection abilities. A YouTube video was pulled up on each of the iPads and the iPad Air easily loaded the video in a timely fashion while the rest of the iPads lagged behind in order from most recent to oldest.

One of the most noticeable differences between the iPads is the screen. The original iPad screen appears to be so dark and dim when lined up against the newer, improved, brighter iPad of the current generation. Now that Apple is hopping on the bandwagon for retina dispay, we can expect the screens to just keep getting better.

"In the battle for speediest tablet, there can be only one victor," Mashable's Lance Ulanoff said. "In our side-by-side tests of every single full-sized iPad generation ever made, not surprisingly, the Apple iPad Air makes a strong case for supremacy."