Between the Ring 4 and Smart Band 10, the Ring 4 comes out ahead in water resistance, while the Smart Band 10 wins on battery life and sport modes. Overall, the Ring 4 scores 52.9 and the Smart Band 10 scores 78.8 on our Mars Score.
Which should you buy?
The Smart Band 10 is the clear pick on raw spec strength, leading by 25.9 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 Ring 4 if you care most about water resistance. The biggest gaps in its favor are water resistance.
Pick the Smart Band 10 if you care most about battery life and sport modes. Its strongest claims are battery life, sport modes.
Both ship with comparable gps, spo2, so those specs don't separate the two — focus on the differences below.
Bottom line: the Smart Band 10 is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why Oura - Ring 4 wins
- ▲Water resistance — 5.00 ATM more. 10 vs 5.
Why Xiaomi - Smart Band 10 wins
- ▲Battery life — 162.50% more. 21 days vs 8 days.
- ▲Sport modes — 110.00 more. 150 vs 40.
Spec comparison
Fitness
| Spec | Oura - Ring 4 | Xiaomi - Smart Band 10 |
|---|---|---|
| GPS | false | false |
| Heart rate | true | true |
| SpO2 | true | true |
| Sleep tracking | true | true |
| Sport modes | 40 | 150lead |
Battery
| Spec | Oura - Ring 4 | Xiaomi - Smart Band 10 |
|---|---|---|
| Battery life | 8 days | 21 dayslead |
| Water resistanceⓘ | 10 ATMlead | 5 ATM |
Design
| Spec | Oura - Ring 4 | Xiaomi - Smart Band 10 |
|---|---|---|
| Display size | 0 " | 1.72 "lead |
| Weight | 3.3 glead | 16 g |
Frequently asked
Spec-level deep dives
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