iPad 1 vs. iPad 2 Specs.

Display	9.7-inch LED-backlit IPS LCD	9.7-inch LED-backlit IPS LCD
Resolution	1024 x 768	1024 x 768
Processor	1GHz Apple A4	1GHz dual-core Apple A5
Graphics	PowerVR SGX 535	?
Memory	256MB RAM	?
Storage	16GB / 32GB / 64GB	16GB / 32GB / 64GB
Front camera	none	VGA
Rear camera	none	720p
Cellular radio	EDGE plus triband HSPA	EDGE plus quadband HSPA or CDMA / EV-DO Rev. A
WiFi	802.11a/b/g/n	802.11a/b/g/n
Bluetooth	2.1 + EDR	2.1 + EDR
Accelerometer	3-axis	3-axis
Gyroscope	No	3-axis
Thickness	13.4mm	8.8mm
Weight	680g (WiFi), 730g (WiFi + 3G)	601g (WiFi), 607g (Verizon), 613g (AT&T)