iPad 2 has better specs.
Check the review below(sources)
ipad 2 is one third thinner than ipad 1 ipad 2 has a dual core 1ghz a5 chip and ipad 1 has a single core 1ghz a4 chip so ipad 2 should have almost twice as much processing power ipad 2 has 2 cameras and ipad 1 doesn't have any cameras
The ipad 1 does not the ipad 2 does.
Yes, an iPhone and iPod cable will also work. The AC power adapter is different with the iPad, but the cable is the same.
The iPad 2 and 3 have Cameras! The iPad 1 does not!
Yes, though the iPad 3 is one mm thicker than the iPad 2
To replace the iPad 1 and improve it.
No. The camera was introduced in iPad 2.
yes
The iPad 1 and iPad 2 both had a resolution of 1024x768, for a total of 786432 pixels.
Only Apple Apps such as 'iMovie' will really be 'iPad 2' Only Apps. All iPad 1 Apps will work on the iPad 2.
No, the 2 is thinner. The length and width are the same.
The iPad 2 is slimmer and has a camera. On the menu of the iPad 2 it should have extra icons like FaceTime, Photo Booth and Camera.