# Dreame L40s Ultra AE vs iRobot Roomba Max 715 Vac + AutoEmpty Dock

As of Oct 31, 2026, the Dreame L40s Ultra AE costs $670 and the iRobot Roomba Max 715 Vac + AutoEmpty Dock costs $700, so the Dreame L40s Ultra AE is $30 cheaper. The Dreame L40s Ultra AE scores higher in our ranking (7.2 vs 5.8 out of 10). Pick the Dreame L40s Ultra AE for large mixed floor homes on a mid budget. Pick the iRobot Roomba Max 715 Vac + AutoEmpty Dock for carpeted homes that do not need a mop.

Prices checked Oct 31, 2026. HTML version: https://robotsforthat.com/vs/dreame-l40s-ultra-ae-vs-irobot-roomba-max-715-vac/

## Side by side

| | Dreame L40s Ultra AE | iRobot Roomba Max 715 Vac + AutoEmpty Dock |
|---|---|---|
| Price | $670 | $700 |
| 3 year cost | $670 | $700 |
| Our score | 7.2/10 | 5.8/10 |
| Rank in Floors | #16 | #38 |
| Status | on sale | on sale |
| Warranty | 3 years (Dreame US store) | n/a |
| Suction | 19,000 Pa claimed (Dreame) | 30,000 Pa (iRobot rating per PCWorld); iRobot's store says 4X the Roomba 105 |
| Navigation | LDS LiDAR (Dreame); Vacuum Wars measured 0.87 m2 per minute against a 0.70 average | ClearView Pro LiDAR with 3D maps, up to 5 maps, about 9 min per 1,000 sq ft (iRobot); PCWorld found the map mostly accurate but it merged two rooms |
| Obstacle avoidance | RGB AI camera plus 3D structured light, 120+ obstacle types (Dreame); Vacuum Wars saw it avoid 19 of 24 objects | PrecisionVision AI recognizes cords, socks, shoes, toys and pet waste (iRobot); PCWorld saw it push through shoes and chew magazines, while Just A Dad Approved scored its clutter test 8.5/10 |
| Mopping | 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 | No |
| Self empty | Yes, 3.2 L dust bag, up to 100 days (Dreame) | Yes, AllergenLock bag that iRobot says lasts up to 90 days; Just A Dad Approved saw the dock fail to fully empty the bin 5 of 5 times |
| Dock features | 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) | Auto empty and charging only |
| Runtime | Up to 180 min and 1,808 sq ft (Dreame); Vacuum Wars estimated about 2,462 sq ft per charge | n/a |
| Dustbin | 395 ml on the product page, but Dreame's comparison table lists 300 ml or more | Robot bin size not published |
| Height | 97 mm (Dreame dimensions) | About 4.1 in (PCWorld) |
| Pet hair | Liftable rubber brush plus TriCut Brush 3.0 (Dreame); Vacuum Wars measured 81% pet hair pickup and 0% hair wrap with the TriCut brush | Dual rubber brushes and anti tangle edge brush (iRobot); Just A Dad Approved saw long hair wrap the rollers and side brush |
| App | Dreamehome app with Alexa, Google Home, Siri and Apple Watch (Dreame); Matter support (Just A Dad Approved) | Roomba Home app with schedules, rooms, no go zones, Smart Clean suggestions and iPhone Live Activities (PCWorld) |
| Threshold | 20 mm (Dreame) | Not published by iRobot |
| Noise | n/a | Not measured; PCWorld found the auto empty cycle surprisingly loud |
| Weight | n/a | 7.5 lb robot (iRobot) |
| Best for | large mixed floor homes on a mid budget | carpeted homes that do not need a mop |
| Skip if | corner cleaning and heavy pet hair matter most | your floors are mostly hard surfaces |

## What reviewers found

### 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/)

### iRobot Roomba Max 715 Vac + AutoEmpty Dock

- PCWorld: Initial mapping took about 13 min. Strong on a rug but weak on hard floors at Standard suction until Deep or Smart mode. Handled furniture well but pushed through shoes and chewed up magazines. Loud auto empty. [Source](https://www.pcworld.com/article/3265229/roomba-max-715-vac-review.html)
- Just A Dad Approved (6/10): Three months of home use: carpet 8/10, clutter test 8.5/10, hair tangle 6/10. The dock failed to fully empty the bin in 5 of 5 tries and moist mess pickup failed. [Source](https://justadadapproved.com/product/irobot-roomba-max-715-pet-robot-vacuum-review/)

## Questions buyers ask

### Which is better, the Dreame L40s Ultra AE or the iRobot Roomba Max 715 Vac + AutoEmpty Dock?

The Dreame L40s Ultra AE scores higher in our ranking (7.2 vs 5.8 out of 10). Pick the Dreame L40s Ultra AE for large mixed floor homes on a mid budget. Pick the iRobot Roomba Max 715 Vac + AutoEmpty Dock for carpeted homes that do not need a mop.

### Which is cheaper?

The Dreame L40s Ultra AE at $670, versus $700 for the iRobot Roomba Max 715 Vac + AutoEmpty Dock, checked Oct 31, 2026. Over 3 years with running costs: $670 vs $700.

### What is the difference between the L40s Ultra AE and the Roomba Max 715 Vac + AutoEmpty Dock?

Suction: 19,000 Pa claimed (Dreame) on the L40s Ultra AE, 30,000 Pa (iRobot rating per PCWorld); iRobot's store says 4X the Roomba 105 on the Roomba Max 715 Vac + AutoEmpty Dock. Navigation: LDS LiDAR (Dreame); Vacuum Wars measured 0.87 m2 per minute against a 0.70 average on the L40s Ultra AE, ClearView Pro LiDAR with 3D maps, up to 5 maps, about 9 min per 1,000 sq ft (iRobot)… on the Roomba Max 715 Vac + AutoEmpty Dock. Obstacle avoidance: RGB AI camera plus 3D structured light, 120+ obstacle types (Dreame); Vacuum Wars saw it… on the L40s Ultra AE, PrecisionVision AI recognizes cords, socks, shoes, toys and pet waste (iRobot); PCWorld… on the Roomba Max 715 Vac + AutoEmpty Dock.

Full reviews: [Dreame L40s Ultra AE](https://robotsforthat.com/robot/dreame-l40s-ultra-ae/index.md), [iRobot Roomba Max 715 Vac + AutoEmpty Dock](https://robotsforthat.com/robot/irobot-roomba-max-715-vac/index.md)