Dreame L40 Ultra Gen 2 vs eufy Omni S2: Spec-Based Comparison

The eufy Omni S2 publishes a higher claimed suction figure (30,000 Pa vs 25,000 Pa) and a camera-assisted navigation stack (RGB camera plus 3D TOF), while the Dreame L40 Ultra Gen 2 counters with LiDAR-plus-structured-light navigation that works without a camera, a published battery-runtime figure (up to 231 minutes in its quietest vacuum-only mode), a published 3-year warranty, published weights, and a larger published auto-empty dust bag (3.2 L with a claimed 100-day emptying interval). Both are self-emptying flagship robots with all-in-one docks, and neither manufacturer publishes a noise figure in our data. Every value below comes from manufacturer claims captured in our research database and last verified 2026-08-18; values the manufacturers do not publish are marked unknown rather than filled in. If you are ready to compare live offers, check current pricing for the Dreame L40 Ultra Gen 2 on Amazon and the eufy Omni S2 on Amazon.

Key differences at a glance

Full specification comparison

Where the Dreame L40 Ultra Gen 2 is stronger (published specs)

• Published runtime: up to 231 minutes — though this is the Vacuum Only, Quiet Suction mode, i.e., the most favorable condition; expect less in high-suction or mopping modes.
• Published 3-year warranty: the eufy record has no published warranty terms in our data.
• Larger published auto-empty bag: 3.2 L with a claimed 100-day emptying interval vs the Omni S2's published 2.5 L capacity.
• Published weights: 4.01 kg robot and 8.86 kg base station are documented; eufy publishes neither in our data.
• Shorter dock: 23.23 in tall vs 26.38 in — relevant for under-counter placement.
• Camera-free navigation: LDS LiDAR plus 3D structured-light obstacle avoidance without a camera.

Where the eufy Omni S2 is stronger (published specs)

• Higher claimed suction: 30,000 Pa (AeroTurbo 2.0) vs 25,000 Pa. Both figures are manufacturer marketing claims, not measured performance.
• Roller mop with published pressure: HydroJet 2.0 at 120 RPM with 1.5 kg downward pressure — a different mop architecture from the Dreame's dual spinning pads, with pressure quantified by the manufacturer.
• Sterilization features documented: Eco-Clean Ozone electrolyzed-water sterilization is specified for the wash system.
• Smaller robot footprint: 12.79 x 13.66 x 3.78 in vs 13.78 x 13.78 x 3.82 in.

Specifications neither manufacturer publishes (in our verified data)

We could not verify the following from sufficiently reliable sources, so we mark them unknown rather than filling gaps: noise levels for both robots; mop-washing and drying temperatures for both docks; battery runtime, weight, and warranty terms for the eufy Omni S2; smart-home platform support details (Alexa, Google Home, Apple Home, Matter) for both; and current prices. Prices change frequently and are shown only where a dated source exists on the product pages.

How to read this comparison

This page compares manufacturer-published specifications only. We do not perform hands-on cleaning tests, so we do not declare an overall winner. Where a specification matters to you — for example a published warranty, a quantified mop pressure, camera-free navigation, or a documented runtime figure — prefer the model whose published claims meet your requirement, and treat unmatched suction figures as marketing claims rather than measured performance.

Sources and verification

All specifications above come from manufacturer product pages and specification sheets captured during our research pipeline and stored with per-field provenance in our database. Claims for both products were last verified on 2026-08-18. Values marked "not published in our data" were not found in the manufacturer documentation we reviewed; they may exist elsewhere. As an Amazon Associate, CompareSmartDevice earns from qualifying purchases.