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Head-to-head

Garmin - Instinct 3 Tactical vs Polar - Grit X2 Pro

Last updated · How Mars Score works
Instinct 3 TacticalGARMINRENDER
Probe A
Garmin
Instinct 3 Tactical
56.8/ 100D
GPS & Sensors—· 40%
Battery57· 40%
Design—· 20%
Grit X2 ProPOLARRENDER
Probe B
Polar
Grit X2 Pro
42.6/ 100D
GPS & Sensors—· 40%
Battery43· 40%
Design—· 20%
Quick verdict

Between the Instinct 3 Tactical and Grit X2 Pro, the Instinct 3 Tactical comes out ahead in smartwatch mode and gps mode, while the Grit X2 Pro wins on multi-band gps and ecg. Overall, the Instinct 3 Tactical scores 56.8 and the Grit X2 Pro scores 42.6 on our Mars Score.

Buying advice

Which should you buy?

The Instinct 3 Tactical is the clear pick on raw spec strength, leading by 14.2 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.

Pick the Instinct 3 Tactical if you care most about smartwatch mode and gps mode. The biggest gaps in its favor are smartwatch mode, gps mode, solar charging.

Pick the Grit X2 Pro if you care most about multi-band gps and ecg. Its strongest claims are multi-band gps, ecg.

There are no meaningful ties on the headline specs — every popular-comparison metric has a winner.

Bottom line: the Instinct 3 Tactical is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.

Why Garmin - Instinct 3 Tactical wins

  • ▲Smartwatch mode — 200.00% more. 30 days vs 10 days.
  • ▲GPS mode — 62.79% more. 70 h vs 43 h.
  • ▲Has Solar charging.

Why Polar - Grit X2 Pro wins

  • ▲Has Multi-band GPS.
  • ▲Has ECG.
Full readout

Spec comparison

GPS & Sensors

SpecGarmin - Instinct 3 TacticalPolar - Grit X2 Pro
Multi-band GPSfalsetruelead
Barometric altimetertruetrue
Heart ratetruetrue
ECGfalsetruelead
Pulse Oxtruetrue

Battery

SpecGarmin - Instinct 3 TacticalPolar - Grit X2 Pro
Smartwatch mode30 dayslead10 days
GPS mode70 hlead43 h
Solar chargingtrueleadfalse

Design

SpecGarmin - Instinct 3 TacticalPolar - Grit X2 Pro
Case size50 mmlead47.5 mm
Weight70 glead79 g
Water resistanceⓘ10 ATM10 ATM
Drill down

Spec-level deep dives

Multi-band GPS→Barometric altimeter→Heart rate→ECG→Pulse Ox→Smartwatch mode→GPS mode→Solar charging→Case size→Weight→Water resistance→
By manufacturer

More from the same brands

Garmin →4
Polar →2

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