vs
8.8Display7.1
9.6Health tracking4.9
9.5Sports & outdoor6.2
7.3Build & durability4.8
Dimensions
Size comparison
T-Rex Ultra 2Race 3S
| T-Rex Ultra 2 | Race 3S | Difference | |
|---|---|---|---|
| Height | 51 mm | 46 mm | +5 mm |
| Width | 51 mm | 46 mm | +5 mm |
| Thickness | 14.3 mm | 11.4 mm | +2.9 mm |
| Weight | 89 g | 56 g | +33 g |
Drawn to the same scale from the official dimensions (front and side).
Why is T-Rex Ultra 2 better than Race 3S?
- Battery life (smartwatch mode)30 days vs 12 days2.5×
- Water resistance10 ATM vs 5 ATM2×
- Screen size1.5″ vs 1.32″+14%
- Resolution (width)480 px vs 466 px+3%
Why is Race 3S better than T-Rex Ultra 2?
- Weight89.2 g vs 56 g+59%
- Thickness14.3 mm vs 11.4 mm+25%
- Pixel density322 ppi vs 353 ppi+10%
Specifications
Side by side
| Design & durability | ||
| Case size | 51 mm | 46 mm |
| Weight | 89.2 g | 56 g |
| Thickness | 14.3 mm | 11.4 mm |
| Height | 51 mm | 46 mm |
| Width | 51 mm | 46 mm |
| Case material | Plastic / polymer | Titanium |
| Sapphire crystal | Yes | Yes |
| Lens / cover glass | Sapphire glass | Sapphire crystal |
| Strap material | — | Silicone |
| Water resistance | 10 ATM | 5 ATM |
| Water rating (maker) | — | 50 m |
| Display | ||
| Screen size | 1.5″ | 1.32″ |
| Display technology | AMOLED | AMOLED |
| Panel | AMOLED | AMOLED |
| AMOLED / OLED display | Yes | Yes |
| Always-on display | — | Yes |
| Touchscreen | Yes | Yes |
| Resolution (width) | 480 px | 466 px |
| Resolution (height) | 480 px | 466 px |
| Pixel density | 322 ppi | 353 ppi |
| Peak brightness | 3,000 nits | — |
| Battery | ||
| Battery life (smartwatch mode) | 30 days | 12 days |
| GPS battery life | 40 h | — |
| GPS battery life (dual-band) | 50 h | — |
| Battery capacity | 870 mAh | — |
| Battery type | — | rechargeable lithium-ion |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | Yes | Yes |
| Skin temperature | Yes | — |
| Temperature sensor | Yes | Yes |
| HRV tracking | — | Yes |
| Sleep tracking | Yes | Yes |
| Sensors | — | Optical HR, Barometer, Compass, Thermometer |
| Sports & navigation | ||
| Built-in GPS | Yes | Yes |
| Dual-band GPS | Yes | Yes |
| Satellite systems | — | GPS, GLONASS, GALILEO, BDS, QZSS |
| Offline maps | Yes | Yes |
| Barometric altimeter | Yes | Yes |
| Compass | Yes | Yes |
| Multisport / triathlon mode | — | Yes |
| Sport profiles | 180 | — |
| Dive mode | — | Yes |
| LED flashlight | Yes | — |
| Connectivity | ||
| Wi-Fi | Wi-Fi 4 | — |
| Bluetooth | 5.2 | — |
| Smart features | ||
| Calls from the wrist | Yes | — |
| Speaker | Yes | — |
| Microphone | Yes | — |
| Voice assistant | Yes | — |
| Music on the watch | Yes | Yes |
| Storage | — | 64 GB |
| Platform | ||
| Operating system | — | Suunto OS |
| Platform | Proprietary | Proprietary |
| Works with | Android, iOS | iOS, Android |
