Blueair - 7770i vs Xiaomi - Mi Smart Air Purifier 4 Pro
Between the 7770i and Mi Smart Air Purifier 4 Pro, the 7770i comes out ahead in cadr and coverage, while the Mi Smart Air Purifier 4 Pro wins on several specs. Overall, the 7770i scores 95 and the Mi Smart Air Purifier 4 Pro scores 70.3 on our Mars Score.
Which should you buy?
The 7770i is the clear pick on raw spec strength, leading by 24.7 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 7770i if you care most about cadr and coverage. The biggest gaps in its favor are cadr, coverage, min noise.
The Mi Smart Air Purifier 4 Pro similarly doesn't carry a headline advantage on the popular specs — look at the full table for category-specific deltas.
Both ship with comparable true hepa h13+, activated carbon, so those specs don't separate the two — focus on the differences below.
Bottom line: the 7770i is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why Blueair - 7770i wins
- ▲CADR — 80.00% more. 900 m³/h vs 500 m³/h.
- ▲Coverage — 66.67% more. 100 m² vs 60 m².
- ▲Min noise — 10.00 dB less. 22 vs 32.
Why Xiaomi - Mi Smart Air Purifier 4 Pro wins
- No decisive advantages.
Spec comparison
Performance
| Spec | Blueair - 7770i | Xiaomi - Mi Smart Air Purifier 4 Pro |
|---|---|---|
| CADR | 900 m³/hlead | 500 m³/h |
| Coverage | 100 m²lead | 60 m² |
| True HEPA H13+ | true | true |
| Activated carbon | true | true |
Smart & Noise
| Spec | Blueair - 7770i | Xiaomi - Mi Smart Air Purifier 4 Pro |
|---|---|---|
| Min noise | 22 dBlead | 32 dB |
| Air quality sensor | true | true |
| Smart app | true | true |
Frequently asked
Spec-level deep dives
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