7770i vs Vital 200S
A side-by-side readout for min noise.
Understanding min noise
Min noise is a numeric spec measured in dB. On this metric, lower values are generally better — smaller, lighter, thinner, or less demanding usually translates to a more comfortable or more efficient product. When comparing two products, focus on the percentage gap rather than the raw delta: a 200-unit lead means something very different at the low end of the range than at the high end. Pay attention to the unit, too — manufacturers sometimes quote peak or burst figures that are not sustained in real-world use. Cross-check the published number against independent measurements where possible, especially for performance and battery claims. Finally, remember that a single spec rarely tells the whole story; the Mars Score weighs min noise together with the rest of the spec sheet so one outlier doesn't distort the verdict.
This matchupVital 200S's 23dB is roughly 5% more than 7770i's 22dB (a 1dB gap). Lower is better here, so 7770i takes the lead in real use.
Other specs on this comparison
See the full Air Purifiers category for all products ranked by Mars Score.