Main trade-off
Dreame L40 Ultra Gen 2
Gen 2 cannot automatically leave its mops at the dock. That can matter more than its higher suction number around thick rugs.
Head-to-head
Dreame L40 Ultra Gen 2 vs L40s Ultra AE: AE includes the hair-cutting brush and camera recognition
The short answer
Choose L40s Ultra AE for camera-assisted obstacle recognition and its included hair-cutting brush. Gen 2 suits a tidier room where simpler sensing is enough.
Before you choose
The reasoning and the trade-offs
Start with the furniture opening
Dreame L40 Ultra Gen 2 is 97 mm and Dreame L40s Ultra AE 97 mm. Their body heights are effectively the same for a real furniture measurement.
What this is based on
Absolute height difference = |97 - 97| = 0 mm. This compares published minimum chassis heights, not guaranteed safe gap sizes.
Main trade-off
Dreame L40s Ultra AE
AE is not the full L40s Ultra. Do not assume the same threshold climbing, extending side brush or automatic mop removal.
Dreame L40 Ultra Gen 2
- Choose it for
- Keep the floor clear before scheduled runs
- Prefer a camera-free obstacle setup
- Main trade-off
- Gen 2 cannot automatically leave its mops at the dock. That can matter more than its higher suction number around thick rugs.
Dreame L40s Ultra AE
- Choose it for
- Cables or toys are often left out
- Use the included TriCut brush for hair
- Main trade-off
- AE is not the full L40s Ultra. Do not assume the same threshold climbing, extending side brush or automatic mop removal.
About this comparison
Choose L40s Ultra AE for camera-assisted obstacle recognition and its included hair-cutting brush. Gen 2 suits a tidier room where simpler sensing is enough.
The chassis does not settle this close-name comparison
Winner by situation
Start with what you need it to do
Keep the floor clear before scheduled runs
Both benefit from a floor cleared of cables and toys. Gen 2 is recorded without a camera, while AE adds RGB-camera recognition. A consistently clear floor reduces the reason to prioritize that extra sensing.
- Dreame L40 Ultra Gen 2
- Good
- Dreame L40s Ultra AE
- Good
Cables or toys are often left out
AE uses an RGB camera with structured light. Gen 2 is recorded without a camera. Obstacle recognition can improve the intended use case without making either robot safe to ignore around every cable or pet accident.
- Dreame L40 Ultra Gen 2
- Depends
- Dreame L40s Ultra AE
- Better fit
Prefer a camera-free obstacle setup
AE lists a complementary TriCut brush. A hair-cutting accessory changes maintenance, but its presence should be confirmed on the exact Amazon bundle.
- Dreame L40 Ultra Gen 2
- Better fit
- Dreame L40s Ultra AE
- Depends
Use the included TriCut brush for hair
L40 Gen 2 and L40s AE have identical listed dimensions, while AE adds camera-assisted sensing and a cutting-brush package.
- Dreame L40 Ultra Gen 2
- Depends
- Dreame L40s Ultra AE
- Better fit
What matters in practice
The differences that matter
Start with the furniture opening
Dreame L40 Ultra Gen 2 is 97 mm and Dreame L40s Ultra AE 97 mm. Their body heights are effectively the same for a real furniture measurement.
How we reached this conclusion
Absolute height difference = |97 - 97| = 0 mm. This compares published minimum chassis heights, not guaranteed safe gap sizes.
Separate the floor mechanism from the maintenance task
Dreame L40 Ultra Gen 2 uses rotating pads. Dreame L40s Ultra AE uses rotating pads. AE lists a complementary TriCut brush. A hair-cutting accessory changes maintenance, but its presence should be confirmed on the exact Amazon bundle.
How we reached this conclusion
Exact product records document mop types and the maintenance or carpet limitation discussed above. No matched stain-removal or pickup percentage is inferred.
Same chassis, different preparation routine
L40 Gen 2 and L40s AE have identical listed dimensions, while AE adds camera-assisted sensing and a cutting-brush package.
How we reached this conclusion
Both 350 × 350 × 97 mm. Gen 2 obstacleCamera false. AE obstacleCamera true and cuttingBrushIncluded true.
Choice A
Dreame, L40 Ultra Gen 2
L40 Ultra Gen 2
An extending side brush and mop cover edges in a shorter body than the original L40. The newer generation gives up automatic mop removal.
- Best matched use
- Edge cleaning beneath moderately low furniture
Checked facts
- 350 × 350 × 97 mm robot body
- 10.5 mm mop lift with no automatic mop removal
- 25,000 Pa rated suction and 5,200 mAh battery
Choice B
Dreame, L40s Ultra AE
L40s Ultra AE
A rubber brush and included TriCut alternative give you two ways to manage hair. The extending mop follows wall edges without a climbing mechanism.
- Best matched use
- Choosing a brush for shedding pets and long hair
Checked facts
- 350 × 350 × 97 mm body and 5,200 mAh battery
- Liftable rubber brush and complementary TriCut brush
- RGB camera with structured light and 19,000 Pa rated suction
Meaningful differences
What changes the fit
| What changes | Dreame L40 Ultra Gen 2 | Dreame L40s Ultra AE | Why it matters |
|---|---|---|---|
| Robot body height | 97 mm | 97 mm | Measure the lowest obstruction, then allow operating margin. |
| Mop design | rotating pads | rotating pads | Different motion and contact areas prevent a simple pressure ranking. |
| Carpet handling | 10.5 mm lift, no automatic removal | Check the selected carpet mode | Lifting and removing a wet mop are different strategies. |
| Station outer size | Check the exact installation drawing | Check the exact installation drawing | Tank removal, approach and cable clearance need extra room. |
| Relevant package detail | 10.5 mm mop lift with no automatic mop removal | Liftable rubber brush and complementary TriCut brush | Use the exact model generation and bundle. |
What you give up
Every choice has a cost
If you choose Dreame L40 Ultra Gen 2
- Automatic detergent dosing requires a separately purchased dispenser module.
If you choose Dreame L40s Ultra AE
- The fixed 97 mm body needs more clearance than the shortest flagship robots.
What matters in practice
How to make the call
The chassis does not settle this close-name comparison
Both are 350 by 350 by 97 mm and both list 5,200 mAh batteries. These shared specifications leave sensing and the brush package to decide.
A camera is a capability and a preference
AE uses an RGB camera with structured light. Gen 2 is recorded without a camera. Obstacle recognition can improve the intended use case without making either robot safe to ignore around every cable or pet accident.
Check which brush is actually included
AE lists a complementary TriCut brush. A hair-cutting accessory changes maintenance, but its presence should be confirmed on the exact Amazon bundle.
What this comparison cannot tell you
- Manufacturer climbing limits use defined test shapes and surfaces. They are not a guarantee on every doorway.
- Suction ratings, mop pressure and dock water temperature do not establish matched real-home cleaning results.
What the facts say
What the comparison shows
Useful conclusions from the current robot vacuums comparison, followed by the checked facts used to reach them.
Compared set
Only 11 of 52 models checked match every need here: “I need it under low furniture” and “Mopping matters as much as vacuuming”.
11 matching models from 52 checkedMeasured difference
Dreame L40 Ultra Gen 2 lists 25,000 Pa for manufacturer-rated suction, 32% above Dreame L40s Ultra AE at 19,000 Pa.
- Dreame L40 Ultra Gen 2
- 25,000 Pa
- Dreame L40s Ultra AE
- 19,000 Pa
- Comparable models
- 34 of 52
See the checked facts and calculation notes
Match countThe count uses the current product-to-need assignments for “I need it under low furniture” and “Mopping matters as much as vacuuming”. A need with no documented match does not count.
Calculation noteThis compares published pascal ratings. Brush design, airflow and software can still change real cleaning performance. 34 of 52 models have comparable published figures for context.
| Product | Needs matched | Checked facts | Source records |
|---|---|---|---|
| Dreame L40 Ultra Gen 2 |
|
|
|
| Dreame L40s Ultra AE |
|
|
|
Ready to choose?
Check the price. Read the owner reviews.
Open either model on Amazon to check the current price, customer reviews and delivery options.
Dreame L40 Ultra Gen 2
Keep the floor clear before scheduled runs
See price & reviews on AmazonDreame L40s Ultra AE
Cables or toys are often left out
See price & reviews on AmazonLinks open in a new tab.