Samsung Gear S2 (SM-R720) vs Samsung Galaxy Watch (42mm SM-R815U)
Side by side comparison between Samsung Gear S2 vs Samsung Galaxy Watch smartwatches, differences, pros, cons and full specifications. What's the better?
,
1.2"
AMOLED
AMOLED
360x360
N/A
512MB
RAM
RAM
Dual-core
250
mAh
mAh
(Non removable)
vs
1.2"
AMOLED
AMOLED
360x360
N/A
1.5GB
RAM
RAM
Dual-core
270
mAh
mAh
(Non removable)
What's the better smartwatch? Samsung Galaxy Watch (42mm SM-R815U)
The phonemore's choice is much more technical than personal. Therefore, you shouldn't only consider this. Our goal is to help you, but what's important to us may not be important to you. You decide which one is the best! Comment!
1 Advantage 
12 Advantages | 19 Common items in both devices |
| Super AMOLED |
| 16 million |
| 360x360 pixels |
| 424 PPI |
| 1.2" |
| Capacitive |
| Multitouch |
| +12 specs and more in the table below |
Check the comparison table below for more items that are not evaluated in comparison score above.
Highlight differences Clear highlight📱 Model features | ||
| Samsung Gear S2 (SM-R720) | Galaxy Watch (42mm SM-R815U) | |
| Model | Gear S2 (SM-R720) | Galaxy Watch (42mm SM-R815U) |
| Other model names | Samsung Gear S2 BT SM-R720, Samsung Orbis | Galaxy Watch 42mm (4G LTE) SM-R815UZDAXAR, Samsung Galileo |
| Country or region available |  (Global, International) |  USA |
| Brand | Samsung | Samsung |
| Release date | 10/1/2015 | 8/9/2018 |
| Depth | 13.4 millimeters (0.53 inches) | 12.7 millimeters (0.5 inches) |
| Size (width x height) | 44 x 51.8 millimeters (1.73 x 2.04 in) | 41.9 x 45.7 millimeters (1.65 x 1.8 in) |
| Weight | 51 grams (1.79 ounces) | 49 grams (1.72 ounces) |
| Build, materials | feature not registered | Stainless steel body, glass front |
| Protection against water and others | Waterproof (IP?) | 5 ATM: 50 meters waterproof. MIL-STD-810G military certified: salt, dust, humidity, rain, vibration, solar radiation, transport and thermal shock resistant. |
📲 Display | ||
| Samsung Gear S2 (SM-R720) | Galaxy Watch (42mm SM-R815U) | |
| Display type | Super AMOLED | Super AMOLED |
| Screen size | 1.2" inches | 1.2" inches |
| Screen-to-body ratio | ~20.4% (screen-to-body ratio) | ~24.3% (screen-to-body ratio) |
| Display resolution | 360x360 pixels | 360x360 pixels (1:1) |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
| Pixel density (dot pitch) | 424 PPI | 424 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Gorilla Glass 3 | Gorilla Glass DX+ |
| Refresh rate | feature not registered | feature not registered |
| Display features | feature not registered | Not supported |
🤖 Operating System | ||
| Samsung Gear S2 (SM-R720) | Galaxy Watch (42mm SM-R815U) | |
| System version | Tizen 2.3 | Tizen 4.0 |
| Firmware update | Tizen 2.3.2 | feature not registered |
| User Interface | feature not registered | feature not registered |
⚙️ Processor | ||
| Samsung Gear S2 (SM-R720) | Galaxy Watch (42mm SM-R815U) | |
| Chipset | 32bit: Samsung Exynos 2 Dual 3250 (28nm) | 64bit: Samsung Exynos 9110 (10nm) |
| CPU | Dual-core, 1 processor: 2x 1GHz ARM Cortex-A7 (Dual-core) | Dual-core, 1 processor: 2x 1.15GHz ARM Cortex-A53 (Dual-core) |
| GPU graphical controller | ARM Mali-400 MP2 400Mhz | ARM Mali-T720 MP1 (667MHz) |
| Performance (benchmark) | feature not registered | feature not registered |
💽 Memory and storage | ||
| Samsung Gear S2 (SM-R720) | Galaxy Watch (42mm SM-R815U) | |
| RAM memory | 512MB LPDDR2 | 1.5GB LPDDR4 |
| Internal storage | 4GB (2GB available) | 4GB (1.5GB available) eMMC 5.1 |
| External storage | Not supported | Not supported |
📶 Mobile networks | ||
| Samsung Gear S2 (SM-R720) | Galaxy Watch (42mm SM-R815U) | |
| Dual-SIM | Not supported | Not supported |
| SIM card | Not supported | 1 slot (Single-SIM) e-SIM (Eletronic) |
| Maximum Download / Upload | feature not registered | 10 Mbps |
| Network technology | feature not registered | 3G, 4G |
| Frequency, bands | Expand band details Collapse details | |
| GSM MHz band | Not supported | Not supported |
| Primary 2G network | Not supported | Not supported |
| Primary 3G network | Not supported | UMTS 850/1700/1900 |
| Primary 4G network | Not supported | LTE (Bands 2,4,5,12,13,25,26,66) |
| Primary 5G network | Not supported | Not supported |
| Primary data network | Not supported | UMTS, HSDPA, HSUPA, HSPA+, LTE |
| Secondary 2G network | Not supported | Not supported |
| Secondary 3G network | Not supported | Not supported |
| Secondary 4G network | Not supported | Not supported |
| Secondary data network | Not supported | Not supported |
📷 Camera | ||
| Samsung Gear S2 (SM-R720) | Galaxy Watch (42mm SM-R815U) | |
| Back camera (main camera) | Not supported | Not supported |
| Main camera resolution | Not supported | Not supported |
| Video recording (primary) | Not supported | Not supported |
| Flash | Not supported | Not supported |
| Focal aperture | feature not registered | feature not registered |
| Focal length | feature not registered | feature not registered |
| Sensor size | feature not registered | feature not registered |
| Pixel size | feature not registered | feature not registered |
| Autofocus | Not supported | Not supported |
| Touch focus | Not supported | Not supported |
| Image stabilization | feature not registered | Not supported |
| Zoom | Not supported | Not supported |
| Face/smile detection | Not supported | Not supported |
| BSI sensor | Not supported | Not supported |
| HDR | Not supported | Not supported |
| Camera extras | feature not registered | feature not registered |
📸 Front camera | ||
| Samsung Gear S2 (SM-R720) | Galaxy Watch (42mm SM-R815U) | |
| Front camera (secondary) | Not supported | Not supported |
| Front camera resolution | Not supported | Not supported |
| Video recording (secondary) | Not supported | Not supported |
| Front flash | Not supported | Not supported |
| Focal aperture | feature not registered | feature not registered |
| Focal length | feature not registered | feature not registered |
| Sensor size | feature not registered | feature not registered |
| Pixel size | feature not registered | feature not registered |
🔉 Sound and multimedia | ||
| Samsung Gear S2 (SM-R720) | Galaxy Watch (42mm SM-R815U) | |
| Loudspeaker | Supported | Supported |
| Active noise cancellation | Not supported | 1 microphone |
| Radio | Not supported | Not supported |
| TV | Not supported | Not supported |
| Video formats | feature not registered | MP4 |
| Audio formats | MP3, WAV, WMA, eAAC+ | MP3, WAV, WMA, OGG, eAAC+ |
🔌 Connectivity | ||
| Samsung Gear S2 (SM-R720) | Galaxy Watch (42mm SM-R815U) | |
| USB | Not supported | Not supported |
| Audio output | Not supported | Not supported |
| TV output | Not supported | Not supported |
| Bluetooth | 4.1 + A2DP | 4.2 + A2DP |
| WiFi | 802.11 b/g/n [wifi4] (2.4GHz) | 802.11 b/g/n [wifi4] (2.4GHz) |
| DLNA | Not supported | Not supported |
| GPS | Not supported | A-GPS, GeoTagging, GLONASS |
| NFC | Supported | Supported |
| Infrared port | Not supported | Not supported |
🧭 Sensors | ||
| Samsung Gear S2 (SM-R720) | Galaxy Watch (42mm SM-R815U) | |
| Sensors | Accelerometer Ambient light sensor Barometer Gyroscope Heart rate | Accelerometer Ambient light sensor Barometer Gyroscope Heart rate Pedometer |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| Samsung Gear S2 (SM-R720) | Galaxy Watch (42mm SM-R815U) | |
| Battery type | Li-Ion: lithium-ion (Non removable) | Li-Ion: lithium-ion (Non removable) |
| Battery capacity | 250 mAh | 270 mAh |
| Charger, watts | Wired charging | 3.5W (5V/7A) Wired charging |
| Inductive / wireless charging | feature not registered | Qi wireless charging |
| Talk time autonomy | feature not registered | feature not registered |
| Standby | 48 hours (2 days) | 72 hours (3 days) |
➕ Other features | ||
| Samsung Gear S2 (SM-R720) | Galaxy Watch (42mm SM-R815U) | |
| Call control | Voice dialing, Voice recorder, Voice commands | Voice dialing, Voice recorder, Voice commands |
| Messaging | SMS, MMS, E-mail | SMS (T9), MMS, E-mail, Push mail |
| Hands-free calling | Supported | Supported |
| Video calling | Not supported | Not supported |
| Ringtones | Polyphonic and customized | Polyphonic and customized |
| Web browser | Not supported | Not supported |
| Antenna | Internal antenna | Internal antenna |
| Qwerty physical keyboard | Not supported | Not supported |
| Miscellaneous | • Colors: Dark Gray, Silver • Stainless Steel body • Samsung Pay • S-Voice, S-Health • Wireless Charging (Qi) • IP68 certified: dust and water resistant up to 1.5m and 30min | • Colors: Midnight Black, Rose Gold • Straps: Black, Grey, Red, Yellow, Purple, Pink, Brown • Compatible with standard 20mm straps • Always-on display • Rotating bezel • Samsung Pay • Compatible with Sprint, T-Mobile and Verizon carriers |
☢️ Radiation rate | ||
| Samsung Gear S2 (SM-R720) | Galaxy Watch (42mm SM-R815U) | |
| SAR 1.6W/kg (USA, Mexico, etc.) | 0.08W/kg (head), 0.61W/kg (body) | 0.961W/kg (head), 1.786W/kg (body) |
| SAR 2W/kg (Europe, UK, etc.) | feature not registered | feature not registered |