Nexus 10

Screen 10.055” 2560 x 1600 (300 ppi)
WQXGA, HD PLS
Corning® Gorilla® Glass 2
Size W: 10.39 in (263.9 mm)
H: 6.99 in (177.6 mm)
D: 0.35 in (8.9 mm)
Weight 1.33 lbs (603 g)
Cameras 5MP (main), 1080p video
1.9MP (front), 720p video
Memory 16 GB or 32 GB (formatted capacity will be less)
CPU/GPU CPU: Dual-core A15 Eagle
GPU: Mali T604
RAM 2GB
Sensors Accelerometer, Compass, Ambient light, Gyroscope, Pressure, GPS
Wireless Dual-band Wi-Fi 802.11 b/g/n (MIMO+HT40)
Bluetooth
Dual-side NFC (Android Beam)
Connectivity Micro USB
Micro HDMI
3.5mm headphone jack
Battery 9,000 mAh Lithium polymer
Standby: up to 500 hours
Music playback: up to 90 hours
Video playback: up to 9 hours
Web browsing: up to 7 hours
OS Android 4.2 (Jelly Bean)

Nexus 4

Screen 4.7” 1280×768 (320ppi)
WXGA, HD IPS+
Corning® Gorilla® Glass 2
Size H: 5.27 in (133.9 mm)
W: 2.7 in (68.7 mm)
D: 0.36 in (9.1 mm)
Weight 0.31 lbs (139 g)
Cameras Main: 8MP BSI sensor, 1080p video
Front: 1.3MP, 720p video
Face recognition
Memory 8GB or 16GB (formatted capacity will be less)
Chipset Qualcomm Snapdragon S4 Pro 1.5GHz (Adreno 320 GPU)
RAM 2GB
Sensors Accelerometer, Compass, Ambient light, Proximity, Gyroscope, Pressure, GPS
Network Unlocked GSM/UMTS/HSPA+
GSM/EDGE/GPRS (850, 900, 1800, 1900 MHz)
3G (850, 900, 1700, 1900, 2100 MHz)
HSPA+ 42 Mbps
Wireless Wireless display on a Miracast compatible HD TV
Dual-band Wi-Fi (802.11 b/g/n)
Bluetooth
NFC (Android Beam)
Power Wireless charging (use any Qi-compatible charger)
2,100 mAH Li-polymer battery
Standby: up to 250 hours
Talk time: up to 10 hours
Music playback: up to 40 hours
Video playback: up to 8 hours
Web browsing: up to 7 hours
OS Android Jelly Bean (4.2)

via http://techcrunch.com/2012/10/29/here-are-the-official-specs-for-the-nexus-4-and-nexus-10/