22 facts in comparison
Dreo Air Purifier 338 vs Dreo Air Purifier 338S
This comparison puts the Dreo Air Purifier 338 and Dreo Air Purifier 338S side by side — two Air Purifiers measured against the same 22-spec sheet, with every meaningful gap scored and explained. On our weighted VS Score the Dreo Air Purifier 338S finishes ahead, 100 to 94 — a solid lead.
The most consequential difference is app control — the Dreo Air Purifier 338S has it, the Dreo Air Purifier 338 does not. None of our retail partners currently lists the Dreo Air Purifier 338S, so availability may be limited and price cannot factor into this comparison. A transparency note before you dive in: the spec sheets are Dreo Air Purifier 338 73% and Dreo Air Purifier 338S 64% complete. Anything unverified shows as Unknown and is left out of the scores — we never estimate a missing value.
Where the Dreo Air Purifier 338 beats the Dreo Air Purifier 338S
No standout advantages.
Where the Dreo Air Purifier 338S beats the Dreo Air Purifier 338
- Has app control ?
- Has voice assistant ?
Key real-world differences
The spec sheet pulls in both directions. These are the gaps big enough to shape the decision — with the actual figures, and what each one means in real-world use.
- App controlSmart featuresNo vs Yes — only the Dreo Air Purifier 338S has it
Control and monitor it from a phone app.
- Voice assistantSmart featuresNo vs Yes — only the Dreo Air Purifier 338S has it
Works with Alexa and Google Assistant.
Which one should you buy?
There is no single answer — it depends on what you will actually use it for. Match your priority to the pick below.
- Best for smart features Dreo Air Purifier 338S takes the category 100 to 69 — driven by app control (No vs Yes).
- Best for design Dreo Air Purifier 338 takes the category 100 to 0.
- The safe all-rounder Dreo Air Purifier 338S wins more of the categories that carry real weight, topping the overall VS Score at 100.
Where each one falls short
Dreo Air Purifier 338
- App control: No vs Yes
- Voice assistant: No vs Yes
- 6 specs are unreported (shown as Unknown) and excluded from its scores.
Dreo Air Purifier 338S
- No major spec weaknesses in this matchup — the gaps that exist are small.
- 8 specs are unreported (shown as Unknown) and excluded from its scores.
What matters to you?
Drag the sliders to weight each category and re-rank the products to suit your priorities.
Score breakdown
How the VS Score works — and what it can’t tell you
Every measurable spec is scored relative to this matchup: the best value here earns 100%, the worst 0%, and everything between scales linearly. Each spec then counts according to an editorial weight that reflects real-world impact — a battery-capacity gap moves the score far more than a colour-options list. The category scores above are the weighted results inside each group, and the overall VS Score rolls all of them together; the evidence line under each category names the specs that actually decided it.
Unknown values are never estimated. A spec a product doesn’t report simply drops out of that product’s scoring — it isn’t penalised with a guess — and a spec only one side reports can never produce a “win”. The trade-off is honest but real: a thinner spec sheet means a score built on fewer data points, which is why the completeness figures are disclosed under About this data.
Most importantly: a spec-sheet lead is not the same as a better product. Megapixels, gigahertz and benchmark points describe capacity, not experience — image processing, software optimisation, thermals, haptics and ergonomics decide how a device actually feels, and no table captures reliability or long-term support quality. Treat the scores as a structured summary of what can be measured, read the caveats under each key difference, and use the weight tuner to re-rank the comparison by what matters to you.
Performance
Clean Air Delivery Rate — how quickly smoke particles are scrubbed from the air.
The room size the purifier is rated to clean effectively.
How many times the air in the rated room is cycled each hour.
The number of filtration layers air passes through.
Filtration
A certified HEPA filter captures 99.97% of 0.3-micron particles.
The HEPA grade of the main filter (e.g. H13).
A carbon layer absorbs odours, smoke and VOCs.
Pellet-based carbon beds absorb more odour than thin coated sheets.
A rinseable pre-filter catches hair and large dust to extend filter life.
How long the main filter lasts before replacement.
Noise & power
The lowest-speed noise output; quieter suits bedrooms.
Noise at full speed; lower is better.
Maximum power draw; lower costs less to run continuously.
A dimmed, near-silent mode for overnight use.
Design
A lighter unit is easier to move between rooms.
The height of the unit.
Smart features
Measures particle levels to show and react to air quality.
Adjusts fan speed automatically based on measured air quality.
Control and monitor it from a phone app.
Works with Alexa and Google Assistant.
Tells you when the filter needs replacing.
Schedule the purifier to switch off automatically.
About this data
- Specifications are compiled from each manufacturer’s official spec sheet, cross-checked against trusted specification databases, and normalised into one schema so identical things are compared identically.
- Specifications last verified August 23, 2026.
- Data completeness: Dreo Air Purifier 338 73% and Dreo Air Purifier 338S 64% of the 22 specs in this category. Anything we could not verify is shown as Unknown — never estimated — and is excluded from all scores.
- Prices and availability come from live retailer feeds via our shopping partners and refresh throughout the day; a missing price means no partner currently lists the product, not that it is discontinued.
- Want the full picture? Our editorial guidelines explain how we research products, weight the scores and stay independent.
- Spotted an error in a spec? Tell us and we will correct the sheet.
Where to buy
No price is available to track yet.
Prices and availability may change. Check the retailer before buying. We may earn a commission on purchases.
What reviewers say
The bottom line
The Dreo Air Purifier 338S comes out ahead, scoring 100 to 94 on our VS Score. It leads on Smart features. The Dreo Air Purifier 338 answers back with stronger Design. Pick the Dreo Air Purifier 338S unless Design matters most to you — then the Dreo Air Purifier 338 is the smarter buy.
