According to the spec sheet the hardware is identical. The tactix 8 is the tactical version of the fenix 8 with a Cerakote coating.

Short answer

tactix 8 - stealth mode, night vision, ballistics, Cerakote. fenix 8 51 mm - the same hardware for much less.

Key differences

SpecGarmin fenix 8 51mm AMOLEDGarmin tactix 8 51mm AMOLED Cerakote Coating
Display1.4", AMOLED, 454×4541.4", AMOLED, 454×454
Memory32 GB32 GB
Battery lifeup to 29 daysup to 29 days
ConnectivityBluetooth, ANT+, Wi-FiBluetooth, ANT+, Wi-Fi
NavigationGPS, GLONASS, Galileo, QZSS, BeiDouGPS, GLONASS, Galileo, QZSS, BeiDou
NFCyesyes
Sensorsheart rate, barometer, compass, gyroscope, temperatureheart rate, barometer, compass, gyroscope, temperature
Protection10 ATM10 ATM
CompatibilityiPhone, AndroidiPhone, Android
Dimensions, weight51×51×14.7 mm51×51×14.7 mm, 94 g
Pricecurrent pricescurrent prices

Specs come from the device pages on Smartphone.ua.

What's the same

1.4" AMOLED 454×454, 32 GB, up to 29 days, Wi-Fi, NFC, 10 ATM, 51×51×14.7 mm.

Tactical features

The tactix can switch off wireless signals and has a mode for night-vision devices.

Who it's for

For hiking and sport the fenix is plenty.

Verdict: who should buy which

  • Service - tactix 8.
  • Sport and hiking - fenix 8 51 mm.

FAQ

Is battery life the same?
Yes, up to 29 days.

How heavy is the tactix?
94 g.

Which is cheaper?
The fenix 8 51 mm.

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