Galaxy Tab S 10.5" vs Galaxy Tab S 8.4"

Link	Samsung Galaxy Tab S 10.5"	Galaxy Tab S 8.4"
Operating System	Android Kitkat 4.4.2	Android Kitkat 4.4.2
Battery
Removable	No	No
Battery capacity	7,900 mAh	4,900 mAh
Interface
Hardware keyboard	- No (available as accessory)	- No (available as accessory)
Screen size	10.5 in	8.4 ”
Screen resolution	2560x1600(WQXGA) Super AMOLED	2560x1600(WQXGA) Super AMOLED
Touch screen	Yes	Yes
Storage
Built-in memory
External memory	Yes Expandable up to 128gb MicroSD	Yes Expandable up to 128gb MicroSD
Connectivity
Wi-Fi	Yes WiFi 802.11 a/b/g/n/ac MIMO	Yes WiFi 802.11 a/b/g/n/ac MIMO
Bluetooth®	Yes Bluetooth 4.0	Yes Bluetooth 4.0
3G	Yes	Yes
4G LTE	Yes	Yes
Camera
Rear camera	Yes 8M w/ Flash LED	Yes 8M w/ Flash LED + 2.1M Full HD
Front camera	Yes 2.1M Full HD	Yes 2.1M Full HD
Autofocus	Yes	Yes
Flash	Yes	Yes
Video recording	Yes	Yes
Video call	Yes	Yes
Sensors
Accelerometer	Yes	Yes
Barometer	Yes	Yes
Magnetometer	Yes	Yes
Gyroscope	Yes	Yes
Proximity sensor	Yes	Yes
GPS	Yes	Yes
Product details
Processor	Qualcomm Snapdragon 800 2.3 GHz Quadcore	Qualcomm Snapdragon 800 2.3 GHz Quadcore
RAM	3 gb RAM	3 gb RAM
Radio frequency bands	LTE : 800/ 900/ 1800/ 2600+850/ 2100; 3G : 850/ 900/ 1900/ 2100; 2G : 850/ 900/ 1800/ 1900	LTE : 800/ 900/ 1800/ 2600+850/ 2100; 3G : 850/ 900/ 1900/ 2100; 2G : 850/ 900/ 1800/ 1900