Roborock S8+ vs Dreame L40 Ultra

Which Robot Vacuum Is Better?

Products

Roborock S8+
Dreame L40 Ultra

Tested using Methodology v1.0

Updated Jul 17, 2025 03:21 PM

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Amazon.com

Tested using Methodology v1.0

Updated Jan 30, 2026 02:17 PM

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Dreame
  1. Recommended in 1 article:
  2. Robot Vacuums For Carpet

Our Verdict

Roborock S8+/S8

Dreame L40 Ultra

The Dreame L40 Ultra is much more feature-rich than the Roborock S8+, but the Roborock has the edge performance-wise. The L40 Ultra's base station can empty its dustbin, refill its water tank, and clean and dry its mopping pads with hot water and air. The obstacle avoidance system is also much more advanced than the S8+, with an RGB camera, LED light, and a more advanced sensor. That said, the Roborock is more effective on every surface type and offers better mopping performance. These performance differences are mostly due to the L40 Ultra's haphazard pathing, which yields inconsistent results. 

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Variants

  • S8+ (Black)
  • S8 (Black)
  • L40 Ultra (White)

Check Price

White
L40 Ultra
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Dreame
White
L40 Ultra
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Amazon.com
Black
S8+
Amazon.com
White
L40 Ultra
Walmart.com
White
L40 Ultra
Lowes.com
 
White
L40 Ultra
HomeDepot.com
 
White
L40 Ultra
BestBuy.com

Main Differences for
Multi-Surface Household

Threshold 

0.10

Multi-Surface Household 
 

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Full Comparison

Design

Build Quality 
 

N/A
N/A

Build Quality Picture  

Roborock S8+/S8 Build Quality Picture Sample

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Dreame L40 Ultra Build Quality Picture Sample

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Vacuum & Mop Combo 
 

Locked
Locked
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User Maintenance 
 

N/A
N/A

Maintenance Picture  

Roborock S8+/S8 Maintenance Picture Sample

SAMPLE

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Dreame L40 Ultra Maintenance Picture Sample

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Brushroll Cleaning Video  

Roborock S8+/S8 Brushroll Cleaning Video Sample

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Dreame L40 Ultra Brushroll Cleaning Video Sample

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Recurring Cost 
 

N/A
N/A

Recurring Cost Picture  

Roborock S8+/S8 Recurring Cost Picture Sample

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Dreame L40 Ultra Recurring Cost Picture Sample

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Bag Part Number  

Locked
Locked

Filter Part Number  

Locked
Locked

HEPA Filter Part Number  

Locked
Locked
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Dimensions 
 

Robot Vacuum Dimensions  

Roborock S8+/S8 Robot Vacuum Dimensions Sample

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Dreame L40 Ultra Robot Vacuum Dimensions Sample

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Robot Vacuum Height  

Lock cm (Lock")
Lock cm (Lock")

Robot Vacuum Width  

Lock cm (Lock")
Lock cm (Lock")

Robot Vacuum Depth  

Lock cm (Lock")
Lock cm (Lock")

Docking Station Dimensions  

Roborock S8+/S8 Docking Station Dimensions Sample

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Dreame L40 Ultra Docking Station Dimensions Sample

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Docking Station Height  

Lock cm (Lock")
Lock cm (Lock")

Docking Station Width  

Lock cm (Lock")
Lock cm (Lock")

Docking Station Depth  

Lock cm (Lock")
Lock cm (Lock")
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Internal Dirt Compartment 
 

N/A
N/A

Dirt Compartment Photo  

Roborock S8+/S8 Dirt Compartment Photo Sample

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Dreame L40 Ultra Dirt Compartment Photo Sample

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Dirt Compartment Capacity 
 

Lock L
Lock L

Full Indicator 
 

Locked
Locked
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Station Maintenance Capabilities 
 

N/A
N/A

Station Photo  

Roborock S8+/S8 Station Photo Sample

SAMPLE

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Dreame L40 Ultra Station Photo Sample

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Auto Empty 
 

Locked
Locked

Bagless Station 
 

Locked
Locked

Dirt Compartment Capacity 
 

Lock L
Lock L

Automatic Tank Refill 
 

Locked
Locked

Mop Washing 
 

Locked
Locked

Mop Drying 
 

Locked
Locked
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In The Box 
 

In The Box Picture  

Roborock S8+/S8 In The Box Picture Sample

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Dreame L40 Ultra In The Box Picture Sample

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Battery 
 

N/A
N/A

Minimum Battery Life 
 

Lock min
Lock min

Maximum Battery Life 
 

Lock min
Lock min

Recharge Time 
 

Lock min
Lock min

Removable Batteries 
 

Locked
Locked
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Quality-Of-Life Features 
 

Picture Of Controls  

Roborock S8+/S8 Picture Of Controls Sample

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Dreame L40 Ultra Picture Of Controls Sample

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Power Adjustment 
 

Locked
Locked

Easy On/Off 
 

Locked
Locked

Surface Type Adjustment 
 

Locked
Locked
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Brushroll And Tools 
 

Brushroll And Tools Photo  

Roborock S8+/S8 Brushroll And Tools Photo Sample

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Dreame L40 Ultra Brushroll And Tools Photo Sample

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Brushroll Setup 
 

Locked
Locked

Brushroll Type 
 

Locked
Locked

Side Brush Setup 
 

Locked
Locked

Side Brush Type 
 

Locked
Locked
Performance

Hard Floor Pickup 
 

N/A
N/A

Hard Floor Pickup Video  

Roborock S8+/S8 Hard Floor Pickup Video Sample

SAMPLE

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Dreame L40 Ultra Hard Floor Pickup Video Sample

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Hard Floor Pickup Post Test  

Roborock S8+/S8 Hard Floor Pickup Post Test Sample

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Dreame L40 Ultra Hard Floor Pickup Post Test Sample

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High-Pile Carpet Pickup 
 

N/A
N/A

High-Pile Carpet Pickup Video  

Roborock S8+/S8 High-Pile Carpet Pickup Video Sample

SAMPLE

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Dreame L40 Ultra High-Pile Carpet Pickup Video Sample

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High-Pile Carpet Pickup Post Test  

Roborock S8+/S8 High-Pile Carpet Pickup Post Test Sample

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Dreame L40 Ultra High-Pile Carpet Pickup Post Test Sample

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Low-Pile Carpet Pickup 
 

N/A
N/A

Low-Pile Carpet Pickup Video  

Roborock S8+/S8 Low-Pile Carpet Pickup Video Sample

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Dreame L40 Ultra Low-Pile Carpet Pickup Video Sample

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Low-Pile Carpet Pickup Post Test  

Roborock S8+/S8 Low-Pile Carpet Pickup Post Test Sample

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Dreame L40 Ultra Low-Pile Carpet Pickup Post Test Sample

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Pet Hair Pickup 
 

N/A
N/A

Pet Hair Pickup Video  

Roborock S8+/S8 Pet Hair Pickup Video Sample

SAMPLE

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Dreame L40 Ultra Pet Hair Pickup Video Sample

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Pet Hair Pickup Post Test  

Roborock S8+/S8 Pet Hair Pickup Post Test Sample

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Dreame L40 Ultra Pet Hair Pickup Post Test Sample

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Airflow 
 

N/A
N/A

Maximum Airflow Video  

Roborock S8+/S8 Maximum Airflow Video Sample

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Dreame L40 Ultra Maximum Airflow Video Sample

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Maximum Head Airflow 
 

Lock CFM (Lock m³/min)
Lock CFM (Lock m³/min)
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Noise 
 

N/A
N/A

Noise Video 
 

Roborock S8+/S8 Noise Video Sample

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Dreame L40 Ultra Noise Video Sample

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Bare Floor 
 

Lock dBA
Lock dBA

Low-Pile Carpet 
 

Lock dBA
Lock dBA
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Household Adaptability 
 

N/A
N/A

Household Adaptability  

Roborock S8+/S8 Household Adaptability Sample

SAMPLE

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Dreame L40 Ultra Household Adaptability Sample

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Obstacle Avoidance 
 

N/A
N/A

Obstacle Avoidance Technology 
 

Locked
Locked

Object Recognition 
 

Locked
Locked

Obstacle Video  

Roborock S8+/S8 Obstacle Video Sample

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Dreame L40 Ultra Obstacle Video Sample

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Bare Floor: Avoidance Rate 
 

Lock%
Lock%

Bare Floor: Intervention Rate 
 

Lock%
Lock%

Carpet: Avoidance Rate 
 

Lock%
Lock%

Carpet: Intervention Rate 
 

Lock%
Lock%

Always Avoided Pet Waste 
 

Locked
Locked
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Height Clearance 
 

N/A
N/A

Height Clearance Video  

Roborock S8+/S8 Height Clearance Video Sample

SAMPLE

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Dreame L40 Ultra Height Clearance Video Sample

SAMPLE

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Lowest Height Cleared 
 

Locked
Locked
Show Text 

Threshold Clearance 
 

N/A
N/A

Low Threshold Video  

Roborock S8+/S8 Low Threshold Video Sample

SAMPLE

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Dreame L40 Ultra Low Threshold Video Sample

SAMPLE

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High Threshold Video  

Roborock S8+/S8 High Threshold Video Sample

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Dreame L40 Ultra High Threshold Video Sample

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Max Threshold Height 
 

Lock cm (Lock")
Lock cm (Lock")
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Air Quality 
 

Sealing Quality Video  

Roborock S8+/S8 Sealing Quality Video Sample

SAMPLE

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Dreame L40 Ultra Sealing Quality Video Sample

SAMPLE

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Anti-Allergy Filter (HEPA) 
 

Locked
Locked
Show Text 

Cracks 
 

N/A
N/A

Cracks Video  

Roborock S8+/S8 Cracks Video Sample

SAMPLE

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Dreame L40 Ultra Cracks Video Sample

SAMPLE

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Wood Cracks Post Test  

Roborock S8+/S8 Wood Cracks Post Test Sample

SAMPLE

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Dreame L40 Ultra Wood Cracks Post Test Sample

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Stains 
 

N/A
N/A

Stain Video  

Roborock S8+/S8 Stain Video Sample

SAMPLE

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Dreame L40 Ultra Stain Video Sample

SAMPLE

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Stain Pickup Post Test  

Roborock S8+/S8 Stain Pickup Post Test Sample

SAMPLE

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Dreame L40 Ultra Stain Pickup Post Test Sample

SAMPLE

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Water 
 

N/A
N/A

Wet Compatible 
 

Locked
Locked

Water Video  

Roborock S8+/S8 Water Video Sample

SAMPLE

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Dreame L40 Ultra Water Video Sample

SAMPLE

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Water Pickup Post Test  

Roborock S8+/S8 Water Pickup Post Test Sample

SAMPLE

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Dreame L40 Ultra Water Pickup Post Test Sample

SAMPLE

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Show Text 
Automation

Physical Automation 
 

N/A
N/A

Recharge And Resume 
 

Locked
Locked

Pathing Algorithm 
 

Locked
Locked

Physical Boundary Markers 
 

Locked
Locked

Scheduled Start Buttons 
 

Locked
Locked

Cycle Control Buttons 
 

Locked
Locked

Navigation Control Buttons 
 

Locked
Locked
Show Text 

Companion App Automation 
 

N/A
N/A

Companion App Screen Grabs  

Roborock S8+/S8 Companion App Screen Grabs Sample

SAMPLE

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Dreame L40 Ultra Companion App Screen Grabs Sample

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App Name 
 

Locked
Locked

Software Boundary Markers (No-Go Zones) 
 

Locked
Locked

App Scheduled Start 
 

Locked
Locked

App Cycle Control 
 

Locked
Locked

Navigation Control Within App 
 

Locked
Locked
Show Text 
To Be Deleted

Check Price

White
L40 Ultra
SEE PRICE
Dreame
White
L40 Ultra
SEE PRICE
Amazon.com
Black
S8+
Amazon.com
White
L40 Ultra
Walmart.com
White
L40 Ultra
Lowes.com
 
White
L40 Ultra
HomeDepot.com
 
White
L40 Ultra
BestBuy.com

Roborock S8+/S8

Dreame L40 Ultra

Comments

  1. Comparison

Roborock S8+ vs Dreame L40 Ultra: Main Discussion

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