Comparison

Roborock Saros 20 vs Dreame X40 Ultra vs Dreame X50 Ultra Blanca

Detailed Technical Comparison

Best Score

1 / 9

Roborock Saros 20

8,8

Overall score

View on Amazon View Specifications

1 / 8

Dreame X40 Ultra

7,6

Overall score

View on Amazon View Specifications

1 / 10

Dreame X50 Ultra Blanca

8,4

Overall score

View on Amazon View Specifications

Scores

Roborock Saros 20

Overall score 8,8

Power and Battery 9,2

Brushing System 8,9

Mopping System 8,5

Cleaning Base 7,7

Navigation and Intelligence 9,7

Dreame X40 Ultra

Overall score 7,6

Power and Battery 6,4

Brushing System 7,9

Mopping System 7,8

Cleaning Base 7,4

Navigation and Intelligence 8,9

Dreame X50 Ultra Blanca

Overall score 8,4

Power and Battery 7,3

Brushing System 9,1

Mopping System 7,8

Cleaning Base 8,1

Navigation and Intelligence 9,5

Detailed Technical Comparison

Key features organised by category

General Information

Roborock Saros 20

Dreame X40 Ultra

Dreame X50 Ultra Blanca

Brand Diferente ?	Roborock Saros 20: Roborock	Dreame X40 Ultra: Dreame	Dreame X50 Ultra Blanca: Dreame
Release date Diferente ?	Roborock Saros 20: February 2026	Dreame X40 Ultra: 2024	Dreame X50 Ultra Blanca: 2025

Power and Battery

Roborock Saros 20

Dreame X40 Ultra

Dreame X50 Ultra Blanca

Suction power Diferente ?	Roborock Saros 20: 36.000 Pa	Dreame X40 Ultra: 12.000 Pa	Dreame X50 Ultra Blanca: 20.000 Pa
Battery capacity ?	Roborock Saros 20: 6.400 mAh	Dreame X40 Ultra: 6.400 mAh	Dreame X50 Ultra Blanca: 6.400 mAh
Runtime Diferente ?	Roborock Saros 20: —	Dreame X40 Ultra: 194 min	Dreame X50 Ultra Blanca: 180 min

Brushing System

Roborock Saros 20

Dreame X40 Ultra

Dreame X50 Ultra Blanca

Main brush Diferente ?	Roborock Saros 20: DuoDivide Anti-Tangle Hair Brush	Dreame X40 Ultra: Simple Silicone Brush	Dreame X50 Ultra Blanca: Dual HyperStream Anti-Tangle Hair Brush
Lifting main brush ?	Roborock Saros 20: Sí	Dreame X40 Ultra: Sí	Dreame X50 Ultra Blanca: Sí
Lifting side brush ?	Roborock Saros 20: Sí	Dreame X40 Ultra: Sí	Dreame X50 Ultra Blanca: Sí
Extendable side brush ?	Roborock Saros 20: Sí	Dreame X40 Ultra: Sí	Dreame X50 Ultra Blanca: Sí
Anti-tangle side brush ?	Roborock Saros 20: Sí	Dreame X40 Ultra: Sí	Dreame X50 Ultra Blanca: Sí
Cepillo para zocalos ?	Roborock Saros 20: No	Dreame X40 Ultra: No	Dreame X50 Ultra Blanca: No

Mopping System

Roborock Saros 20

Dreame X40 Ultra

Dreame X50 Ultra Blanca

Mopping type Diferente ?	Roborock Saros 20: Two Rotating Mops 200 RPM 13N	Dreame X40 Ultra: Two Rotating Mops 180 RPM	Dreame X50 Ultra Blanca: Two Rotating Mops 180 RPM
Mop extension Diferente ?	Roborock Saros 20: Sí	Dreame X40 Ultra: Yes, with RoboSwing movement	Dreame X50 Ultra Blanca: Yes, with RoboSwing movement
Mop lifting Diferente ?	Roborock Saros 20: Yes, 12-22 mm	Dreame X40 Ultra: Yes, 10.5 mm	Dreame X50 Ultra Blanca: Yes, 10.5 mm
Floor mopping temperature Diferente ?	Roborock Saros 20: Warm Water	Dreame X40 Ultra: Cold water	Dreame X50 Ultra Blanca: Cold water
Detach mops at base ?	Roborock Saros 20: Sí	Dreame X40 Ultra: Sí	Dreame X50 Ultra Blanca: Sí
Mop dirt detection ?	Roborock Saros 20: Sí	Dreame X40 Ultra: Sí	Dreame X50 Ultra Blanca: Sí
Floor dirt detection ?	Roborock Saros 20: Sí	Dreame X40 Ultra: Sí	Dreame X50 Ultra Blanca: Sí

Cleaning Base

Roborock Saros 20

Dreame X40 Ultra

Dreame X50 Ultra Blanca

Auto-emptying dust bin ?	Roborock Saros 20: Sí	Dreame X40 Ultra: Sí	Dreame X50 Ultra Blanca: Sí
Mop washing Diferente ?	Roborock Saros 20: Yes, with hot water at 100°C	Dreame X40 Ultra: Yes, with hot water at 70°C	Dreame X50 Ultra Blanca: Yes, with hot water at 80°C
Mop drying Diferente ?	Roborock Saros 20: Yes, with hot air at 55°C	Dreame X40 Ultra: Yes, with hot air at 45°C	Dreame X50 Ultra Blanca: Yes, with hot air at 45°C
Self-cleaning wash tray Diferente ?	Roborock Saros 20: Yes, with hot water at 100°C	Dreame X40 Ultra: Yes, 2nd generation	Dreame X50 Ultra Blanca: Yes, 3rd generation
UV disinfection Diferente ?	Roborock Saros 20: No	Dreame X40 Ultra: No	Dreame X50 Ultra Blanca: Sí
Detergent tank ?	Roborock Saros 20: Sí	Dreame X40 Ultra: Sí	Dreame X50 Ultra Blanca: Sí
Automatic mop changing ?	Roborock Saros 20: No	Dreame X40 Ultra: No	Dreame X50 Ultra Blanca: No
Dust bag capacity Diferente ?	Roborock Saros 20: 2.5 L	Dreame X40 Ultra: 3.2 L	Dreame X50 Ultra Blanca: 3.2 L
Clean water tank Diferente ?	Roborock Saros 20: 4 L	Dreame X40 Ultra: 4.5 L	Dreame X50 Ultra Blanca: 4.5 L
Dirty water tank Diferente ?	Roborock Saros 20: 3 L	Dreame X40 Ultra: 4 L	Dreame X50 Ultra Blanca: 4 L
Plumbing connection kit Diferente ?	Roborock Saros 20: No	Dreame X40 Ultra: Yes (purchased separately)	Dreame X50 Ultra Blanca: Yes (purchased separately)
Integrated plumbing connection ?	Roborock Saros 20: No	Dreame X40 Ultra: No	Dreame X50 Ultra Blanca: No

Navigation and Intelligence

Roborock Saros 20

Dreame X40 Ultra

Dreame X50 Ultra Blanca

Navigation system Diferente ?	Roborock Saros 20: StarSight 2.0	Dreame X40 Ultra: 360° LiDAR turret	Dreame X50 Ultra Blanca: 360° Retractable LiDAR
Obstacle avoidance ?	Roborock Saros 20: Sí	Dreame X40 Ultra: Sí	Dreame X50 Ultra Blanca: Sí
AI camera ?	Roborock Saros 20: Yes, dual	Dreame X40 Ultra: Yes, dual	Dreame X50 Ultra Blanca: Yes, dual
Front 3D laser sensor ?	Roborock Saros 20: Sí	Dreame X40 Ultra: Sí	Dreame X50 Ultra Blanca: Sí
No. of recognised obstacles Diferente ?	Roborock Saros 20: 300	Dreame X40 Ultra: 120	Dreame X50 Ultra Blanca: 200
Pet recognition ?	Roborock Saros 20: Sí	Dreame X40 Ultra: Sí	Dreame X50 Ultra Blanca: Sí
Curtain detection ?	Roborock Saros 20: Sí	Dreame X40 Ultra: Sí	Dreame X50 Ultra Blanca: Sí
Remote camera access ?	Roborock Saros 20: Sí	Dreame X40 Ultra: Sí	Dreame X50 Ultra Blanca: Sí
Night vision LED ?	Roborock Saros 20: Sí	Dreame X40 Ultra: Sí	Dreame X50 Ultra Blanca: Sí
AI intelligent cleaning Diferente ?	Roborock Saros 20: Yes, SmartPlan 3.0	Dreame X40 Ultra: Yes, CleanGenius 2.0	Dreame X50 Ultra Blanca: Yes, CleanGenius 2.0
AI stain recognition ?	Roborock Saros 20: Sí	Dreame X40 Ultra: Sí	Dreame X50 Ultra Blanca: Sí
CPU / Algorithm Diferente ?	Roborock Saros 20: ?	Dreame X40 Ultra: AI Sage 11.0 Quad-core	Dreame X50 Ultra Blanca: AI Sage 13.0 Octa-core

Advanced Features

Roborock Saros 20

Dreame X40 Ultra

Dreame X50 Ultra Blanca

Step-climbing ability Diferente ?	Roborock Saros 20: Single step 45 mm - Double step 88 mm	Dreame X40 Ultra: 22 mm	Dreame X50 Ultra Blanca: Single step 42 mm - Double step 60 mm
Robotic arm ?	Roborock Saros 20: No	Dreame X40 Ultra: No	Dreame X50 Ultra Blanca: No
Built-in voice assistant Diferente ?	Roborock Saros 20: Sí	Dreame X40 Ultra: No	Dreame X50 Ultra Blanca: Sí
External voice assistant (Alexa, Google Home...) ?	Roborock Saros 20: Sí	Dreame X40 Ultra: Sí	Dreame X50 Ultra Blanca: Sí

Robot Tanks

Roborock Saros 20

Dreame X40 Ultra

Dreame X50 Ultra Blanca

Robot dust bin Diferente ?	Roborock Saros 20: 270 ml	Dreame X40 Ultra: 300 ml	Dreame X50 Ultra Blanca: 395 ml
Robot water tank Diferente ?	Roborock Saros 20: 69 ml	Dreame X40 Ultra: 80 ml	Dreame X50 Ultra Blanca: 80 ml

Robot Dimensions

Roborock Saros 20

Dreame X40 Ultra

Dreame X50 Ultra Blanca

Robot diameter Diferente ?	Roborock Saros 20: 353 mm	Dreame X40 Ultra: 350 mm	Dreame X50 Ultra Blanca: 350 mm
Robot height Diferente ?	Roborock Saros 20: 79.8 mm	Dreame X40 Ultra: 97 mm	Dreame X50 Ultra Blanca: 89 mm

Base Dimensions

Roborock Saros 20

Dreame X40 Ultra

Dreame X50 Ultra Blanca

Base width Diferente ?	Roborock Saros 20: 381 mm	Dreame X40 Ultra: 340 mm	Dreame X50 Ultra Blanca: 340 mm
Base height Diferente ?	Roborock Saros 20: 488 mm	Dreame X40 Ultra: 590.5 mm	Dreame X50 Ultra Blanca: 590.5 mm
Base depth Diferente ?	Roborock Saros 20: 475 mm	Dreame X40 Ultra: 456.7 mm	Dreame X50 Ultra Blanca: 456.7 mm