The iPad 2 vs iPad 3 vs iPad 4 Comparison Chart:

Feature	iPad 2	iPad 3	iPad 4
CPU:	Dual-Core Apple A5	Dual-Core Apple A5X	Dual-Core Apple A6X
Graphics:	PowerVR SGX543MP2	PowerVR SGX543MP4	PowerVR SGX543MP4
Display:	1024x768	2048x1536	2048x1536
Memory:	512 MB	1 GB	1 GB
Storage:	16, 32, 64 GB	16, 32, 64 GB	16, 32, 64 GB
Camera:	Front-facing and 720p rear-facing	720p Front-facing and iSight 5 MP rear-facing	720p Front-facing and iSight 5 MP rear-facing
Data Rate:	3G	4G LTE	4G LTE
Wi-Fi:	802.11 a/b/g/n	802.11 a/b/g/n	802.11 a/b/g/n
Bluetooth:	2.1 + EDR	4.0	4.0
Siri:	NO	YES	YES
Accelerometer:	YES	YES	YES
Compass:	YES	YES	YES
Gyroscope:	YES	YES	YES
GPS:	3G Version Only	4G Version Only	4G Version Only