Samsung Galaxy Watch Ultra 2 vs Garmin fēnix 8 Pro 51 mm AMOLED Specs Comparison
The Galaxy Watch Ultra 2 is the better choice for smartwatch features, apps and everyday convenience, while the Fenix 8 Pro 51mm AMOLED is much stronger for battery life, navigation and serious training. Pick Samsung for the smarter watch, Garmin for the better sports watch.
Key differences
Feature
Samsung Galaxy Watch Ultra 2
Garmin fēnix 8 Pro 51 mm AMOLED
Release date
2026-07
September 2025
Physical size
47.4 x 47.1 x 10.7 mm
51 x 51 x 16.5 mm
Weight
61.5 g
90 g
Material
Titanium case; sapphire crystal
Fiber-reinforced polymer case; titanium bezel and rear cover
Water resistance
10 ATM; IP69K; MIL-STD-810H; EN13319
10 ATM
Display type
Super AMOLED, full-colour Always On Display
AMOLED (always-on capable) touchscreen
Display size
1.5 inches (38.5 mm)
1.4 inch (35.56 mm) diameter
Display resolution
498 x 498 pixels
454 x 454 pixels
Full specs comparison
Use the full table below for the complete side-by-side specification breakdown.
| Specification | | |
|---|---|---|
| General | ||
| Release date | 2026-07 | September 2025 |
| Physical size | 47.4 x 47.1 x 10.7 mm | 51 x 51 x 16.5 mm |
| Weight | 61.5 g | 90 g |
| Material | Titanium case; sapphire crystal | Fiber-reinforced polymer case; titanium bezel and rear cover |
| Water resistance | 10 ATM; IP69K; MIL-STD-810H; EN13319 | 10 ATM |
| Color options | Titanium Gray, Titanium Silver | Multiple color and material combinations |
| Display type | Super AMOLED, full-colour Always On Display | AMOLED (always-on capable) touchscreen |
| Display size | 1.5 inches (38.5 mm) | 1.4 inch (35.56 mm) diameter |
| Display resolution | 498 x 498 pixels | 454 x 454 pixels |
| Display brightness | Up to 5,000 nits | |
| Display protection | Sapphire crystal | Sapphire crystal |
| Battery | Built-in rechargeable battery; 800 mAh | Rechargeable built-in lithium-ion battery |
| Battery life | Up to 80 hours with AOD off; up to 60 hours with AOD on | Up to 27 days in smartwatch mode (15 days always-on); up to 78 hours GPS-only |
| Charging | Fast wireless charging | Garmin proprietary charging cable |
| Sensors | ||
| GNSS type | Built-in dual-band GNSS | Multi-band GNSS with SatIQ |
| GPS | Yes | Yes |
| GALILEO | Yes | Yes |
| GLONASS | Yes | Yes |
| QZSS | Yes | Yes |
| Beidou | Yes | Yes |
| Accelerometer | Yes | Yes |
| Gyroscope | Yes | Yes |
| Barometric altimeter | Yes | Yes |
| Compass | Yes | Yes |
| Geomagnetic | Yes | No |
| Ambient light sensor | Yes | Yes |
| Optical heart rate | Yes | Yes |
| Electrical heart rate | Yes | Yes |
| SpO2 | Yes | Yes |
| Temperature | Yes | Yes |
| Galvanic skin response | Yes | No |
| Microphone | Yes | Yes |
| Speakers | Yes | Yes |
| Vibration motor | Yes | Yes |
| Health & activity tracking | ||
| Steps | Yes | Yes |
| Distance | Yes | Yes |
| Calories burned | Yes | Yes |
| Floors | Yes | Yes |
| Sports tracking | Yes | Yes |
| Sleep | Yes | Yes |
| Heart rate | Yes | Yes |
| HRV | Yes | Yes |
| Stress | Yes | Yes |
| Blood oxygen | Yes | Yes |
| Respiration rate | Yes | Yes |
| Skin temperature | Yes | Yes |
| ECG | Yes | Yes |
| Blood pressure | Yes (Samsung Health Monitor; availability varies by market, calibration required) | No |
| Body composition | Yes | No |
| Glucose | No | No |
| Hydration level | No | No |
| UV exposure | No | No |
| Calorie intake | No | No |
| Hyperglycemia risk assessment | No | No |
| Arterial stiffness detection | No | No |
| Pulse wave arrhythmia analysis | Yes | No |
| Daily smart features | ||
| Smartphone compatibility | Android with Google Mobile Services | iPhone and Android |
| Operating system at launch | Wear OS 7 Powered by Samsung; One UI 9 Watch | Garmin proprietary wearable platform |
| Processor | Qualcomm Snapdragon Wear Elite / SDW6100 (3 nm, penta-core) | |
| RAM | 2 GB | |
| Storage | 64 GB | 32 GB |
| Bluetooth | Yes (6.0) | Yes |
| Wi-Fi | Yes (802.11 a/b/g/n, 2.4/5 GHz) | Yes |
| NFC / connected pay | Yes | Yes |
| UWB | No | No |
| Cellular | Yes (LTE/eSIM) | Yes (LTE) |
| Smartphone notifications | Yes | Yes |
| Bluetooth calling | Yes | Yes (with paired compatible smartphone) |
| Smartphone music control | Yes | Yes |
| On-board music storage | Yes | Yes |
| Voice assistant | Google Gemini / Bixby | Yes (paired smartphone voice assistant) |
| Navigation, safety & special features | ||
| Maps | Yes (Google Maps) | Yes |
| Offline maps | Yes (Google Maps) | Yes |
| Navigation | Yes (turn-by-turn navigation) | Yes |
| Emergency SOS | Yes | Yes (Garmin Assistance and inReach SOS with active plan) |
| Satellite SOS | No | Yes (inReach satellite SOS with active subscription) |
| Fall detection | Yes | Yes (Incident Detection during select activities) |
| LED flashlight | No | Yes (built-in LED flashlight) |
| Diving | Yes (EN13319; depth and dive metrics to 40 m) | Yes (recreational diving to 40 m) |
| Links | ||
| Affiliate link | Amazon, Samsung | Amazon, Garmin |
| Read more | Article | Article |