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Product comparison · 2 smartwatches

Amazfit T-Rex Ultra 2 vs Samsung Galaxy Watch 8, LTE + Bluetooth, 40mm, Sport Band, Graphite, S/M + Athleisure Band, Graphite, S/M

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  • 36specifications compared
  • 17differ
  • 19identical
  • 71known for one product only

Key differences

The Samsung Galaxy Watch 8, LTE + Bluetooth, 40mm, Sport Band, Graphite, S/M + Athleisure Band, Graphite, S/M has 5 ppi more pixel density than the Amazfit T-Rex Ultra 2 (327 ppi vs 322 ppi). The Amazfit T-Rex Ultra 2 has 11 mm more watch case size than the Samsung Galaxy Watch 8, LTE + Bluetooth, 40mm, Sport Band, Graphite, S/M + Athleisure Band, Graphite, S/M (51 mm vs 40 mm). The Amazfit T-Rex Ultra 2 has 5 ATM more water resistance than the Samsung Galaxy Watch 8, LTE + Bluetooth, 40mm, Sport Band, Graphite, S/M + Athleisure Band, Graphite, S/M (10 ATM vs 5 ATM). Display resolution: 480 x 480 pixels on the Amazfit T-Rex Ultra 2, 438 x 438 pixels on the Samsung Galaxy Watch 8, LTE + Bluetooth, 40mm, Sport Band, Graphite, S/M + Athleisure Band, Graphite, S/M. Display diagonal: 129.5 cm (51") on the Amazfit T-Rex Ultra 2, 3.3 cm (1.3") on the Samsung Galaxy Watch 8, LTE + Bluetooth, 40mm, Sport Band, Graphite, S/M + Athleisure Band, Graphite, S/M.

  • Display resolution
    • 480 x 480 pixels
    • 438 x 438 pixels
  • Display diagonal
    • 129.5 cm (51")
    • 3.3 cm (1.3")
  • Pixel density
    • 322 ppi
    • 327 ppi
  • Market positioning
    • Sport watch
    • Smartwatch
  • Watch case size
    • 51 mm
    • 40 mm
  • Watch case colour
    • Titanium
    • Graphite
  • Water resistance
    • 10 ATM
    • 5 ATM
  • Operating system installed
    • Zepp OS
    • Wear OS

Side by side

Differences highlightedShow differences only
107 specifications
A

Amazfit

T-Rex Ultra 2View product
B

Samsung

Galaxy Watch 8, LTE + Bluetooth, 40mm, Sport Band, Graphite, S/M + Athleisure Band, Graphite, S/MView product
Display3 differ
Display typeDigitalDigital
Display resolutionDiffers480 x 480 pixels438 x 438 pixels
TouchscreenYesYes
Display diagonalDiffers129.5 cm (51")3.3 cm (1.3")
Display technologyAMOLEDAMOLED
Display technology marketing nameKnown for oneSuper AMOLED
Display brightness3000 cd/m²3000 cd/m²
Pixel densityDiffers322 ppi327 ppi
Always-on displayKnown for oneYes
Colour displayKnown for oneYes
Display number of coloursKnown for one16 million colours
Watch glass typeKnown for oneSapphire
BacklightKnown for oneYes
Processoridentical
Processor manufacturerKnown for oneSamsung
Processor modelKnown for oneExynos W1000
Processor coresKnown for one5
Design5 differ
Market positioningDiffersSport watchSmartwatch
Watch case sizeDiffers51 mm40 mm
Watch case colourDiffersTitaniumGraphite
Watch case materialDiffersTitanium, Glass Fiber Reinforced Polymer (GFRP)Aluminium
ShapeRoundRound
Back materialKnown for oneSapphire glass
International Protection (IP) codeKnown for oneIP68
Water resistanceDiffers10 ATM5 ATM
Band colourKnown for oneBlack, Brown
Band materialKnown for oneSilicone
Band sizeKnown for oneOne Size
Wrist size rangeKnown for one145 - 215 mm
Magnetic charging connectorKnown for oneYes
Waterproof up toKnown for one45 m
Performance2 differ
Built-in microphoneYesYes
Built-in speaker(s)YesYes
Built-in cameraNoNo
FM radioKnown for oneNo
Mobile operating systems supportedDiffersAndroid 7.0, Android 7.1, Android 7.1.2, Android 8.0, Android 8.1, Android 9.0, Android 10, Android 10.0, Android 11.0, Android 12.0, Android 13.0, Android 14.0, Android 15, Android 16, iOS 15, iOS 16, iOS 17, iOS 18, iOS 26Android
Operating system installedDiffersZepp OSWear OS
RAM capacityKnown for one2000 MB
Flash memoryKnown for one32 GB
Fall detectionKnown for oneYes
Featuresidentical
Heart rate monitorYesYes
Heart rate sensor typeKnown for oneElectrical, Optical
Blood pressure monitorKnown for oneYes
Sleep apnea detectionYesYes
AccelerometerYesYes
GyroscopeYesYes
Activity trackerKnown for oneYes
Quality of sleepYesYes
SOS alert functionKnown for oneYes
Audio formats supportedKnown for one3GA, AAC, AMR, AWB, M4A, MP3, OGA, OGG, WAV
CalendarKnown for oneYes
Geomagnetic sensorYesYes
Stress monitoring functionYesYes
Virtual assistantKnown for oneSamsung Bixby
BarometerKnown for oneYes
Military standardKnown for oneMIL-STD-810H
Blood oxygen sensorKnown for oneYes
Built-in speedometerKnown for oneYes
Alarm clockKnown for oneYes
Ambient light sensorKnown for oneYes
Barometric altimeterKnown for oneYes
Call notificationsKnown for oneYes
Electronic compassKnown for oneYes
Find my phone functionKnown for oneYes
Interval trainingKnown for oneYes
Recommended activityKnown for oneRunning, Cycling, Walking, Swimming, Climbing, Hiking, Fishing, Hunting, Skateboarding, Motor sports, Yoga, Pilates, HIIT, Gymnastics, Dance, Boxing, Kickboxing, Hockey, Football, Basketball, Volleyball, Tennis, Handball, Golf, Skiing, Diving
SMS notificationsKnown for oneYes
Skin temperature sensorKnown for oneYes
Smart notificationsKnown for oneYes
StopwatchKnown for oneYes
Sun & moon informationKnown for oneYes
Virtual pacer functionKnown for oneYes
Weather displayKnown for oneYes
World time functionKnown for oneYes
Networkidentical
Mobile network connectionKnown for oneYes
Mobile network generationKnown for one4G
3G standardsKnown for oneUMTS
4G standardKnown for oneLTE-TDD & LTE-FDD
3G bands supportedKnown for one850,900,1900,2100 MHz
4G bands supportedKnown for one600,700,800,850,900,1800,1900,2100,2300,2500,2600 MHz
SIM card typeKnown for oneeSIM
GPS (satellite)YesYes
BeiDouKnown for oneYes
GLONASSKnown for oneYes
GalileoKnown for oneYes
Ports & interfaces1 differ
USB portKnown for oneNo
Wi-FiYesYes
Wi-Fi standardsKnown for one802.11a, 802.11b, 802.11g, Wi-Fi 4 (802.11n)
BluetoothKnown for oneYes
Bluetooth versionDiffers5.25.3
Bluetooth profilesKnown for oneA2DP, AVRCP, HFP, HSP
Near Field Communication (NFC)YesYes
Bluetooth Low Energy (BLE)Known for oneYes
Poweridentical
Battery typeBuilt-in batteryBuilt-in battery
Battery life (max)Known for one40 h
Wireless chargingKnown for oneYes
Charging timeKnown for one1.3 h
Battery lifeKnown for one30 day(s)
Battery life (GPS mode)Known for one177 h
Battery1 differ
Battery capacityDiffers870 mAh325 mAh
Software1 differ
Sports activity appsDiffersStrava, RunKeeper, TrainingPeaksSamsung Health
Weight & dimensions4 differ
WidthDiffers51 mm40.4 mm
DepthDiffers51 mm42.7 mm
ThicknessDiffers1.43 cm8.6 mm
WeightDiffers89.2 g30 g
Other featuresidentical
Number of sports modesKnown for one187
Packaging contentidentical
Charging baseKnown for oneYes
ManualKnown for oneYes

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.

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