Amazfit T-Rex Dual Solar vs Garmin fēnix 9 Pro Solar
The T-Rex Dual Solar is the more unusual option, combining AMOLED with front and rear solar charging in a lighter package. The fēnix 9 Pro Solar sticks with MIP, but offers substantially deeper training features, ECG, 64 GB storage and exceptional solar-assisted endurance, including up to 57 days in smartwatch mode.
Full comparison
The full record
75 specifications across 6 areas, with 31 genuine differences.
1. Design & display Mixed
Fact
Amazfit T-Rex Dual Solar
Garmin fēnix 9 Pro 51 mm Solar
Release date
2026-09-22
August 2026
Physical size
51.4 mm diameter; 16.9 mm thick including heart-rate sensor; 14.5 mm excluding sensor
51 x 51 x 16.6 mm
Weight
69 g without strap
102 g (case only: 77 g)
Material
Grade 5 titanium bezel and buttons; fiber-reinforced polymer middle frame; Grade 5 titanium and glass-ceramic back
Titanium case and bezel; Power Sapphire lens; silicone strap
Water resistance
10 ATM; recreational diving to 50 m
10 ATM
Display type
AMOLED
Transflective MIP touchscreen
Display size
1.32 inch
1.4 inch diameter
Display resolution
466 x 466 pixels (353 ppi)
280 x 280 pixels
Display protection
Sapphire glass
Power Sapphire
2. Battery & charging Garmin fēnix 9 Pro 51 mm Solar
Fact
Amazfit T-Rex Dual Solar
Garmin fēnix 9 Pro 51 mm Solar
Battery
Rechargeable battery; 660 mAh
Rechargeable lithium-ion battery
Battery life
Up to 25 days typical; 13 days heavy use; up to 34 days with front solar / 51 days with rear solar (3 h/day at 50,000 lux); up to 41 hours accurate GPS; Outdoor Extreme up to 40 days / 180 days with continuous rear solar at 50,000 lux
Smartwatch: up to 30 days / 57 days with solar; Low Power Watch Mode: up to 52 days / 291 days with solar; Activity Mode (Normal): up to 75 hours / 124 hours with solar; Activity Mode + Music (Normal): up to 21 hours / 23 hours with solar; Activity Mode (Max Battery): up to 186 hours / 1000 hours with solar; Activity Mode (Extended Battery): up to 100 hours / 211 hours with solar; Activity Mode (Max Accuracy): up to 54 hours / 75 hours with solar; Expedition Mode: up to 42 days / 124 days with solar
Charging
Magnetic charging head; dual-sided solar charging
Garmin proprietary charging cable
3. Sensors & positioning Mixed
Fact
Amazfit T-Rex Dual Solar
Garmin fēnix 9 Pro 51 mm Solar
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
No
Yes
SpO2
Yes
Yes
Temperature
Yes
Yes
Galvanic skin response
No
No
Microphone
Yes
Yes
Speakers
Yes
Yes
Vibration motor
Yes
Yes
4. Health & activity Garmin fēnix 9 Pro 51 mm Solar
Fact
Amazfit T-Rex Dual Solar
Garmin fēnix 9 Pro 51 mm Solar
Steps
Yes
Yes
Distance
Yes
Yes
Calories burned
Yes
Yes
Floors
Yes
Yes
Sports tracking
180+ sports modes
Yes
Sleep
Yes
Yes
Heart rate
Yes
Yes
HRV
Yes
Yes
Stress
Yes
Yes
Blood oxygen
Yes
Yes
Respiration rate
No
Yes
Skin temperature
Yes
Yes
ECG
No
Yes
Blood pressure
No
No
Body composition
No
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
No
No
5. Smart features No clear edge
Fact
Amazfit T-Rex Dual Solar
Garmin fēnix 9 Pro 51 mm Solar
Smartphone compatibility
Android 8.0+ and iOS 17.0+
Android and iOS
Operating system at launch
Zepp OS 6
Garmin proprietary
Storage
26 GB available for maps, music, apps and data
64 GB
Bluetooth
Yes (5.2)
Yes
Wi-Fi
Yes (2.4 GHz)
Yes
NFC / connected pay
Yes (Zepp Pay, region-dependent)
Yes
UWB
No
No
Cellular
No
No
Smartphone notifications
Yes
Yes
Bluetooth calling
Yes
Yes (paired smartphone)
Smartphone music control
Yes
Yes
On-board music storage
Yes
Yes
Voice assistant
Zepp Flow
Yes (paired smartphone)
6. Navigation & safety Garmin fēnix 9 Pro 51 mm Solar
Fact
Amazfit T-Rex Dual Solar
Garmin fēnix 9 Pro 51 mm Solar
Maps
Yes (base, contour and ski-resort maps)
Yes
Offline maps
Yes
Yes
Navigation
Yes (turn-by-turn, POI display, route planning and waypoint navigation)
Yes
Emergency SOS
No
Yes (paired smartphone)
Satellite SOS
No
No
Fall detection
No
Yes
LED flashlight
Yes
Yes (built-in LED flashlight; green light mode)
Diving
Yes (recreational diving to 50 m)
Yes (scuba and apnea to 40 m)