Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Google - Fitbit Inspire 3 | Xiaomi - Smart Band 9 |
|---|---|---|
| Sport modes | 21 | 150 |
| Battery life | 10 days | 21 days |
Between the Fitbit Inspire 3 and Smart Band 9, the Fitbit Inspire 3 comes out ahead in several specs, while the Smart Band 9 wins on sport modes / battery life. Overall, the Fitbit Inspire 3 scores 66.4 and the Smart Band 9 scores 75.8 on our Mars Score.
Which should you buy?
The Smart Band 9 is the clear pick on raw spec strength, leading by 9.4 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.
The Fitbit Inspire 3 does not pull ahead on any single popular-comparison spec — its strengths sit in the spec-table groups rather than the headline advantages.
Pick the Smart Band 9 if you care most about sport modes / battery life. Its strongest claims are sport modes, battery life. The single most decisive one: Sport modes — 129.00 more. 150 vs 21.
Both ship with comparable gps, spo2, water resistance, so those specs do not separate the two — focus on the differences below.
Bottom line: the Smart Band 9 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: Google - Fitbit Inspire 3 or Xiaomi - Smart Band 9?
Xiaomi - Smart Band 9 leads the current Mars Score by 9.4 points.The more useful decision is the trade-off behind that result: compare battery life against the way you will actually use the product.
Choose Google - Fitbit Inspire 3 if…
Google - Fitbit Inspire 3 does not lead a decisive measured field here, so choose it for price, ecosystem, design, or availability when those matter more to you.
Choose Xiaomi - Smart Band 9 if…
Xiaomi - Smart Band 9 has the measurable edge on sport modes, battery days.
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 Google - Fitbit Inspire 3 wins
- No decisive advantages.
Why Xiaomi - Smart Band 9 wins
- ▲Sport modes — 129.00 more. 150 vs 21.
- ▲Battery life — 110.00% more. 21 days vs 10 days.
Spec comparison
Fitness
| Spec | Google - Fitbit Inspire 3 | Xiaomi - Smart Band 9 |
|---|---|---|
| Form factor | Band | Band |
| GPS | false | false |
| Heart rate | true | true |
| SpO2 | true | true |
| Sleep tracking | true | true |
| Sport modes | 21 | 150lead |
Battery
| Spec | Google - Fitbit Inspire 3 | Xiaomi - Smart Band 9 |
|---|---|---|
| Battery lifeⓘ | 10 days | 21 dayslead |
| Water resistanceⓘ | 5 ATM | 5 ATM |
Design
| Spec | Google - Fitbit Inspire 3 | Xiaomi - Smart Band 9 |
|---|---|---|
| Display size | 0.74 " | 1.62 "lead |
| Weight | 21 g | 16 glead |