# Dreame D20 Plus vs Dreame L40s Ultra AE

As of Oct 31, 2026, the Dreame D20 Plus costs $310 and the Dreame L40s Ultra AE costs $670, so the Dreame D20 Plus is $360 cheaper. The Dreame D20 Plus scores higher in our ranking (9.5 vs 7.2 out of 10). Pick the Dreame D20 Plus for pet owners with carpet on a budget. Pick the Dreame L40s Ultra AE for large mixed floor homes on a mid budget.

Prices checked Oct 31, 2026. HTML version: https://robotsforthat.com/vs/dreame-d20-plus-vs-dreame-l40s-ultra-ae/

## Side by side

| | Dreame D20 Plus | Dreame L40s Ultra AE |
|---|---|---|
| Price | $310 | $670 |
| 3 year cost | $358 | $670 |
| Our score | 9.5/10 | 7.2/10 |
| Rank in Floors | #1 | #16 |
| Status | on sale | on sale |
| Warranty | 3 years (Dreame US store) | 3 years (Dreame US store) |
| Suction | 13,000 Pa with five levels (Dreame); Vacuum Wars measured 0.53 kPa sealed suction against a 0.99 kPa average but 18 CFM airflow, above average | 19,000 Pa claimed (Dreame) |
| Navigation | LDS LiDAR with multi floor maps, room selection and virtual barriers (Vacuum Wars) | LDS LiDAR (Dreame); Vacuum Wars measured 0.87 m2 per minute against a 0.70 average |
| Obstacle avoidance | No small object avoidance; Vacuum Wars recorded 0 of 24 obstacles avoided | RGB AI camera plus 3D structured light, 120+ obstacle types (Dreame); Vacuum Wars saw it avoid 19 of 24 objects |
| Mopping | Yes, detachable flat pad with a 350 ml tank and 32 water levels; no mop lift (Dreame, Vacuum Wars) | Dual spinning mops, 10.5 mm lift, MopExtend (Dreame); Vacuum Wars measured only 0.35 g of water left behind and a 269 combined mop score against a 188 average |
| Self empty | Yes, 5 L bag, up to 150 days per bag (Dreame) | Yes, 3.2 L dust bag, up to 100 days (Dreame) |
| Dock features | Auto empty and charging only; no mop washing, drying or water refill (Vacuum Wars) | Auto empty, 167 F (75 C) hot water mop wash, hot air drying, self cleaning washboard, auto detergent and water refill, 4.5 L clean and 4.0 L dirty tanks; water hookup kit sold separately (Dreame) |
| Runtime | Dreame lists 285 min in its lab test; Vacuum Wars got 48 min in a vacuum and mop run but estimated about 2,761 sq ft of coverage per charge | Up to 180 min and 1,808 sq ft (Dreame); Vacuum Wars estimated about 2,462 sq ft per charge |
| Dustbin | 500 ml robot bin plus 5 L dock bag (Dreame) | 395 ml on the product page, but Dreame's comparison table lists 300 ml or more |
| Height | 3.8 in (robot 13.8 x 13.8 x 3.8 in, Dreame) | 97 mm (Dreame dimensions) |
| Pet hair | Vacuum Wars measured 91% flattened pet hair pickup against an 82.2% average and 0% long hair wrap | Liftable rubber brush plus TriCut Brush 3.0 (Dreame); Vacuum Wars measured 81% pet hair pickup and 0% hair wrap with the TriCut brush |
| App | Dreamehome app with room settings, no mop zones, auto empty frequency and carpet boost; works with Alexa, Siri and Google Home (Dreame, Vacuum Wars) | Dreamehome app with Alexa, Google Home, Siri and Apple Watch (Dreame); Matter support (Just A Dad Approved) |
| Threshold | Not published; Dreame's spec table lists 0.79 in under obstacle avoidance without explaining it | 20 mm (Dreame) |
| Noise | Vacuum Chef measured about 74 dB at max suction | n/a |
| Best for | pet owners with carpet on a budget | large mixed floor homes on a mid budget |
| Skip if | your floors are cluttered with cables and small objects | corner cleaning and heavy pet hair matter most |

## What reviewers found

### Dreame D20 Plus

- Vacuum Wars (2.90 Vacuum Wars stars): Removed 93% of embedded sand and 91% of flattened pet hair with 0% long hair wrap, and estimated about 2,761 sq ft per charge. It avoided 0 of 24 obstacles, crevice pickup was below average and mopping scored below average on dried stains. [Source](https://vacuumwars.com/dreame-d20-plus-review/)
- Vacuum Chef (95/100): Hands on review of a unit supplied by Dreame: strong cleaning on carpet, rugs and hard floors and good tangle resistance, but small or low objects were bumped and it reached about 74 dB at max suction. [Source](https://vacuumchef.com/dreame-d20-plus-robot-vacuum-and-mop-review-powerful-13000pa-suction-meets-smart-mid-range-value/)

### Dreame L40s Ultra AE

- Vacuum Wars (3.52 Vacuum Wars stars): 85% carpet sand removal, 81% pet hair pickup, 0% hair wrap, 19 of 24 obstacles avoided and about 2,462 sq ft per charge against a 1,015 average. Named Best Value of the Year. [Source](https://vacuumwars.com/dreame-l40s-series-review/)
- Just A Dad Approved (7.9/10): After 90+ days of home testing, liked the AI camera, included TriCut brush and low upkeep, but said corners get less attention without an extending side brush and recommended buying only on deep sale. Its bottom line text names a different model, so treat the score with care. [Source](https://justadadapproved.com/product/dreame-l40s-ultra-ae-robot/)

## Questions buyers ask

### Which is better, the Dreame D20 Plus or the Dreame L40s Ultra AE?

The Dreame D20 Plus scores higher in our ranking (9.5 vs 7.2 out of 10). Pick the Dreame D20 Plus for pet owners with carpet on a budget. Pick the Dreame L40s Ultra AE for large mixed floor homes on a mid budget.

### Which is cheaper?

The Dreame D20 Plus at $310, versus $670 for the Dreame L40s Ultra AE, checked Oct 31, 2026. Over 3 years with running costs: $358 vs $670.

### What is the difference between the D20 Plus and the L40s Ultra AE?

Suction: 13,000 Pa with five levels (Dreame); Vacuum Wars measured 0.53 kPa sealed suction… on the D20 Plus, 19,000 Pa claimed (Dreame) on the L40s Ultra AE. Navigation: LDS LiDAR with multi floor maps, room selection and virtual barriers (Vacuum Wars) on the D20 Plus, LDS LiDAR (Dreame); Vacuum Wars measured 0.87 m2 per minute against a 0.70 average on the L40s Ultra AE. Obstacle avoidance: No small object avoidance; Vacuum Wars recorded 0 of 24 obstacles avoided on the D20 Plus, RGB AI camera plus 3D structured light, 120+ obstacle types (Dreame); Vacuum Wars saw it… on the L40s Ultra AE.

Full reviews: [Dreame D20 Plus](https://robotsforthat.com/robot/dreame-d20-plus/index.md), [Dreame L40s Ultra AE](https://robotsforthat.com/robot/dreame-l40s-ultra-ae/index.md)