Samsung has announced the Gear S2, and while this is just one watch, it's being offered in three distinct models. A standard Gear S2 will be the leading device, but there's also a "Gear S2 Classic" with a more standard watch design and also a Gear S2 3G with built-in connectivity. Here's how the full spec sheets of these three models break down.

Category Gear S2 Gear S2 Classic Gear S2 3G
Display 1.2-inch circular AMOLED, 360x360 1.2-inch circular AMOLED, 360x360 1.2-inch circular AMOLED, 360x360
Processor Dual-core 1GHz Pega-W Dual-core 1GHz Pega-W Dual-core 1GHz MSM8226
Memory 512MB 512MB 512MB
Storage 4GB internal 4GB internal 4GB internal
Battery 250 mAh Li-ion
2-3 days usage
Wireless charging
250 mAh Li-ion
2-3 days usage
Wireless charging
300 mAh Li-ion
2 days usage
Wireless charging
Connectivity 802.11n Wifi, Bluetooth 4.1, NFC 802.11n Wifi, Bluetooth 4.1, NFC 802.11n Wifi, Bluetooth 4.1, NFC
OS Tizen based wearable platform Tizen based wearable platform Tizen based wearable platform
Sensors Accelerometer, Gyroscope, Heart Rate, Ambient Light, Barometer Accelerometer, Gyroscope, Heart Rate, Ambient Light, Barometer Accelerometer, Gyroscope, Heart Rate, Ambient Light, Barometer, GPS
Dimensions 42.3 x 49.8 x 11.4mm
47g
39.9 x 43.6 x 11.4mm
42g
44.0 x 51.8 x 13.4mm
51g
Resistance IP68 certified dust and water resistant IP68 certified dust and water resistant IP68 certified dust and water resistant
Audio Codec: MP3/AAC/AAC+/eAAC+
Format: MP3, M4A, AAC, OGG
Codec: MP3/AAC/AAC+/eAAC+
Format: MP3, M4A, AAC, OGG
Codec: MP3/AAC/AAC+/eAAC+
Format: MP3, M4A, AAC, OGG
Features Contacts, notifications, messages, email, S Voice, S Health, Nike+ Running, music player, gallery, maps & navigation, weather Contacts, notifications, messages, email, S Voice, S Health, Nike+ Running, music player, gallery, maps & navigation, weather Contacts, notifications, messages, email, S Voice, S Health, Nike+ Running, music player, gallery, maps & navigation, weather