The catch
Dreame L40 Ultra Gen 2
Gen 2 can't leave its mops at the dock on its own, which around thick rugs can matter more than its higher suction number.
Side by side
Dreame L40 Ultra Gen 2 vs L40s Ultra AE guide: The hair-cutting brush and camera recognition both come with AE
Quick verdict
L40s Ultra AE is the pick for camera-assisted obstacle recognition and its included hair-cutting brush. Gen 2 suits a tidier room where simpler sensing is enough.
Before you buy
Why, and what it costs you
Begin with the furniture opening
Dreame L40 Ultra Gen 2 is 97 mm, and Dreame L40s Ultra AE is also 97 mm. Where real furniture is concerned, the body heights come to the same.
Where this comes from
Absolute height difference = |97 - 97| = 0 mm. The comparison uses published minimum chassis heights and does not guarantee safe gap sizes.
The catch
Dreame L40s Ultra AE
AE differs from the full L40s Ultra, so do not assume it has the same threshold climbing, extending side brush or automatic mop removal.
Dreame L40 Ultra Gen 2
- Why pick it
- You clear the floor before scheduled runs
- Like an obstacle setup with no camera
- The catch
- Gen 2 can't leave its mops at the dock on its own, which around thick rugs can matter more than its higher suction number.
Dreame L40s Ultra AE
- Why pick it
- Cables or toys often stay on the floor
- Handle hair with the included TriCut brush
- The catch
- AE differs from the full L40s Ultra, so do not assume it has the same threshold climbing, extending side brush or automatic mop removal.
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What this page compares
L40s Ultra AE is the pick for camera-assisted obstacle recognition and its included hair-cutting brush. Gen 2 suits a tidier room where simpler sensing is enough.
The chassis cannot settle a pair with such close names
Which one fits
Pick the situations that sound like you
You clear the floor before scheduled runs
A floor cleared of cables and toys helps both. Gen 2 is recorded as having no camera, and AE adds RGB-camera recognition. If the floor is always clear, there is less reason to put that extra sensing first.
- Dreame L40 Ultra Gen 2
- Good
- Dreame L40s Ultra AE
- Good
Cables or toys often stay on the floor
AE pairs an RGB camera with structured light, whereas Gen 2 is recorded as having no camera. Obstacle recognition can improve the intended use case, but it does not make either robot safe to ignore around every cable or pet accident.
- Dreame L40 Ultra Gen 2
- Depends
- Dreame L40s Ultra AE
- Better fit
Like an obstacle setup with no camera
A complementary TriCut brush is listed for AE. Since a hair-cutting accessory changes your maintenance, confirm that the exact Amazon bundle really has it.
- Dreame L40 Ultra Gen 2
- Better fit
- Dreame L40s Ultra AE
- Depends
Handle hair with the included TriCut brush
The listed dimensions of L40 Gen 2 and L40s AE are identical, but AE adds camera-assisted sensing and a cutting-brush package.
- Dreame L40 Ultra Gen 2
- Depends
- Dreame L40s Ultra AE
- Better fit
In practice
Differences you will notice
Begin with the furniture opening
Dreame L40 Ultra Gen 2 is 97 mm, and Dreame L40s Ultra AE is also 97 mm. Where real furniture is concerned, the body heights come to the same.
How we worked this out
Absolute height difference = |97 - 97| = 0 mm. The comparison uses published minimum chassis heights and does not guarantee safe gap sizes.
Keep the floor mechanism apart from the maintenance task
Both Dreame L40 Ultra Gen 2 and Dreame L40s Ultra AE use rotating pads. AE lists a complementary TriCut brush. A hair-cutting accessory changes maintenance, though you should confirm it is on the exact Amazon bundle.
How we worked this out
The mop types, along with the maintenance or carpet limitation discussed above, are documented in the exact product records. From them, no matched stain-removal or pickup percentage is inferred.
One chassis, a different preparation routine
The listed dimensions of L40 Gen 2 and L40s AE are identical, but AE adds camera-assisted sensing and a cutting-brush package.
How we worked this out
Each is 350 × 350 × 97 mm. For Gen 2, obstacleCamera false. For AE, obstacleCamera true and cuttingBrushIncluded true.
Option A
Dreame, L40 Ultra Gen 2
L40 Ultra Gen 2
Edges are covered by an extending side brush and mop, and the body is shorter than the original L40's. What the newer generation gives up is automatic mop removal.
- Best for
- Cleaning edges under moderately low furniture
Facts we checked
- Robot body of 350 × 350 × 97 mm
- No automatic mop removal, and a mop lift of 10.5 mm
- 5,200 mAh battery and suction rated at 25,000 Pa
Option B
Dreame, L40s Ultra AE
L40s Ultra AE
You get two ways to deal with hair, a rubber brush and an included TriCut alternative. Its extending mop follows wall edges, and there is no climbing mechanism.
- Best for
- Shedding pets and long hair, with a choice of brush
Facts we checked
- 5,200 mAh battery and a 350 × 350 × 97 mm body
- Rubber brush that lifts, and a TriCut brush that complements it
- Suction rated at 19,000 Pa, with an RGB camera and structured light
Spec by spec
Where they really differ
| Spec | Dreame L40 Ultra Gen 2 | Dreame L40s Ultra AE | In practice |
|---|---|---|---|
| Robot body height | 97 mm | 97 mm | Measure the lowest obstruction first, and then add an operating margin. |
| Mop design | rotating pads | rotating pads | A simple pressure ranking is ruled out by the different motion and contact areas. |
| Carpet handling | 10.5 mm lift, no automatic removal | Check the selected carpet mode | A wet mop can be lifted or removed, and those are different strategies. |
| Station outer size | Check the exact installation drawing | Check the exact installation drawing | Extra room is needed for tank removal, approach and cable clearance. |
| Relevant package detail | 10.5 mm mop lift with no automatic mop removal | Liftable rubber brush and complementary TriCut brush | Go by the exact model generation and bundle. |
Trade-offs
What each pick costs you
With Dreame L40 Ultra Gen 2
- You have to buy a dispenser module separately to get automatic detergent dosing.
With Dreame L40s Ultra AE
- Compared with the shortest flagship robots, the fixed 97 mm body needs more clearance.
Decision guide
How to decide
The chassis cannot settle a pair with such close names
Both measure 350 by 350 by 97 mm, and both list 5,200 mAh batteries. With those specifications shared, sensing and the brush package have to decide.
A camera is both a capability and a preference
AE pairs an RGB camera with structured light, whereas Gen 2 is recorded as having no camera. Obstacle recognition can improve the intended use case, but it does not make either robot safe to ignore around every cable or pet accident.
Confirm which brush comes in the box
A complementary TriCut brush is listed for AE. Since a hair-cutting accessory changes your maintenance, confirm that the exact Amazon bundle really has it.
What this page can’t tell you
- The manufacturer's climbing limits come from defined test shapes and surfaces, so they do not guarantee success at every doorway.
- Matched real-home cleaning results are not established by suction ratings, mop pressure or dock water temperature.
By the numbers
What the data shows
What we found across the robot vacuums we compare, plus the checked facts behind each finding.
How many fit
Only 11 of the 52 models checked meet every need here: “It has to get under my low furniture” and “I care about mopping as much as vacuuming”.
11 models fit, out of 52 checkedThe gap in numbers
Dreame L40 Ultra Gen 2 lists 25,000 Pa for suction rating, 32% more than the 19,000 Pa on Dreame L40s Ultra AE.
- Dreame L40 Ultra Gen 2
- 25,000 Pa
- Dreame L40s Ultra AE
- 19,000 Pa
- Models with this figure
- 34 of 52
Show the facts and the math
How we countedThe count uses each product's current fit ratings for “It has to get under my low furniture” and “I care about mopping as much as vacuuming”. A need with no documented match is not counted.
How we calculatedThese are the pascal ratings makers publish. Brush design, airflow and software still affect how well a robot cleans. For context, 34 of 52 models publish comparable figures.
| Product | Needs it meets | Facts we checked | Sources |
|---|---|---|---|
| Dreame L40 Ultra Gen 2 |
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| Dreame L40s Ultra AE |
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Ready to buy
See today’s price and what owners say
Open either model on Amazon for the current price, customer reviews and delivery options.
Dreame L40 Ultra Gen 2
You clear the floor before scheduled runs
See price & reviews on AmazonDreame L40s Ultra AE
Cables or toys often stay on the floor
See price & reviews on AmazonEach link opens in a new tab.
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