Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Coros - Apex 2 Pro | Garmin - Instinct 3 Tactical |
|---|---|---|
| GPS mode | 75 h | 70 h |
| Multi-band GPS | true | false |
| Solar charging | false | true |
Between the Apex 2 Pro and Instinct 3 Tactical, the Apex 2 Pro comes out ahead in gps mode / multi-band gps, while the Instinct 3 Tactical wins on solar charging. Overall, the Apex 2 Pro scores 74.4 and the Instinct 3 Tactical scores 50.3 on our Mars Score.
Which should you buy?
The Apex 2 Pro is the clear pick on raw spec strength, leading by 24.1 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 Apex 2 Pro if you care most about gps mode / multi-band gps. The biggest gaps in its favor are gps mode, multi-band gps. The single most decisive one: GPS mode — 7.14% more. 75 h vs 70 h.
Pick the Instinct 3 Tactical if you care most about solar charging. Its strongest claims are solar charging. The single most decisive one: Has Solar charging.
Both ship with comparable smartwatch mode, ecg, so those specs do not separate the two — focus on the differences below.
Bottom line: the Apex 2 Pro is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Which should you buy: Coros - Apex 2 Pro or Garmin - Instinct 3 Tactical?
Coros - Apex 2 Pro leads the current Mars Score by 24.1 points.The more useful decision is the trade-off behind that result: compare gps mode against the way you will actually use the product.
Choose Coros - Apex 2 Pro if…
Coros - Apex 2 Pro has the measurable edge on battery gps hours, has multiband gps.
Choose Garmin - Instinct 3 Tactical if…
Garmin - Instinct 3 Tactical has the measurable edge on has solar.
This is a structured comparison of the published catalog values. It is not a claim of identical real-world performance across every workload; use the linked spec drill-downs and methodology page to inspect the inputs.
Why Coros - Apex 2 Pro wins
- ▲GPS mode — 7.14% more. 75 h vs 70 h.
- ▲Has Multi-band GPS.
Why Garmin - Instinct 3 Tactical wins
- ▲Has Solar charging.
Spec comparison
GPS & Sensors
| Spec | Coros - Apex 2 Pro | Garmin - Instinct 3 Tactical |
|---|---|---|
| Multi-band GPS | truelead | false |
| Barometric altimeter | true | true |
| Heart rate | true | true |
| ECG | false | false |
| Pulse Ox | true | true |
Battery
| Spec | Coros - Apex 2 Pro | Garmin - Instinct 3 Tactical |
|---|---|---|
| Smartwatch mode | 30 days | 30 days |
| GPS mode | 75 hlead | 70 h |
| Solar charging | false | truelead |
Design
| Spec | Coros - Apex 2 Pro | Garmin - Instinct 3 Tactical |
|---|---|---|
| Case size | 46.1 mm | 50 mmlead |
| Weight | 66 glead | 70 g |
| Water resistanceⓘ | 10 ATM | 10 ATM |