vs
8.8Display4.4
8.2Battery life9.5
9.6Health tracking8.3
9.5Sports & outdoor7.0
4.1Smart features6.5
7.3Build & durability9.1
Dimensions
Size comparison
T-Rex Ultra 2Enduro 4
| T-Rex Ultra 2 | Enduro 4 | Difference | |
|---|---|---|---|
| Height | 51 mm | 51 mm | = |
| Width | 51 mm | 51 mm | = |
| Thickness | 14.3 mm | 15.7 mm | −1.4 mm |
| Weight | 89 g | 66 g | +23 g |
Drawn to the same scale from the official dimensions (front and side).
Why is T-Rex Ultra 2 better than Enduro 4?
- AMOLED / OLED displayYes · Enduro 4: No
- Sport profiles180 vs 97+86%
- Screen size1.5″ vs 1.4″+7%
- Resolution (width)480 px vs 280 px+71%
- Pixel density322 ppi vs 200 ppi+61%
- Thickness14.3 mm vs 15.7 mm+10%
Why is Enduro 4 better than T-Rex Ultra 2?
- GPS battery life40 h vs 80 h2×
- Battery life (smartwatch mode)30 days vs 36 days+20%
- Weight89.2 g vs 66 g+35%
- GPS battery life (dual-band)50 h vs 60 h+20%
Specifications
Side by side
| Design & durability | ||
| Case size | 51 mm | 51 mm |
| Weight | 89.2 g | 66 g |
| Thickness | 14.3 mm | 15.7 mm |
| Height | 51 mm | 51 mm |
| Width | 51 mm | 51 mm |
| Case material | Plastic / polymer | Titanium |
| Sapphire crystal | Yes | Yes |
| Lens / cover glass | Sapphire glass | Power Sapphire™ |
| Strap material | — | ComfortFit |
| Water resistance | 10 ATM | 10 ATM |
| Water rating (maker) | — | 10 ATM |
| Display | ||
| Screen size | 1.5″ | 1.4″ |
| Display technology | AMOLED | Memory-in-pixel (transflective) |
| Panel | AMOLED | Sunlight-visible, transflective memory-in-pixel |
| AMOLED / OLED display | Yes | No |
| Always-on display | — | Yes |
| Touchscreen | Yes | Yes |
| Resolution (width) | 480 px | 280 px |
| Resolution (height) | 480 px | 280 px |
| Pixel density | 322 ppi | 200 ppi |
| Peak brightness | 3,000 nits | — |
| Battery | ||
| Battery life (smartwatch mode) | 30 days | 36 days |
| Battery saver mode | — | 92 days |
| GPS battery life | 40 h | 80 h |
| GPS battery life (dual-band) | 50 h | 60 h |
| Battery capacity | 870 mAh | — |
| Battery type | — | Lithium ion |
| Solar charging | — | Yes |
| Wireless charging | — | No |
| Charging | — | Garmin proprietary plug charger |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | Yes | Yes |
| ECG | — | Yes |
| Skin temperature | Yes | Yes |
| Temperature sensor | Yes | Yes |
| HRV tracking | — | Yes |
| Sleep tracking | Yes | Yes |
| Sensors | — | GPS, GLONASS, Galileo, QZSS, BeiDou, SatIQ technology, Elevate wrist heart rate monitor, Pulse Ox blood oxygen saturation monitor, Barometric altimeter, Compass, Gyroscope, Accelerometer, Thermometer, Ambient light sensor |
| Sports & navigation | ||
| Built-in GPS | Yes | Yes |
| Dual-band GPS | Yes | Yes |
| Satellite systems | — | GLONASS, GALILEO, BDS, QZSS |
| Offline maps | Yes | Yes |
| Barometric altimeter | Yes | Yes |
| Compass | Yes | Yes |
| Multisport / triathlon mode | — | Yes |
| Sport profiles | 180 | 97 |
| LED flashlight | Yes | Yes |
| Connectivity | ||
| NFC payments | — | Yes |
| Wi-Fi | Wi-Fi 4 | Wi-Fi 4 |
| Bluetooth | 5.2 | — |
| ANT+ sensors | — | Yes |
| Smart features | ||
| Calls from the wrist | Yes | — |
| Speaker | Yes | — |
| Microphone | Yes | — |
| Voice assistant | Yes | — |
| Music on the watch | Yes | Yes |
| Storage | — | 64 GB |
| Third-party apps | — | Yes |
| Platform | ||
| Operating system | — | Garmin OS |
| Platform | Proprietary | Proprietary |
| Works with | Android, iOS | iOS, Android |
