Roborock Saros 20 vs Roborock Saros Z70

Full specification, side by side

Compare	Roborock Saros 20	Roborock Saros Z70
	86/100 $1,600Price in the manufacturer's shop	85/100 $1,000Price in the manufacturer's shop
	Highest Verdict Score
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At a glance
Leads on	Navigation Automation	Value
Pros	Solid-state 3D sensing with no turret: 80 mm tall and still maps in the dark Leaves the mop on the dock for carpet and lifts the chassis over 30 mm of pile 36,000 Pa with a fully anti-tangle brush and an extending side brush	Five-axis arm lifts socks, slippers, tissues and small toys out of its path Solid-state 3D sensing with no turret, in an 80 mm body Mops lift, and come off entirely for carpet while the chassis rises and suction boosts
Cons	Roborock publishes neither the dustbin nor the water tank capacity One year of warranty No plumbed drain: the dirty-water tank is still emptied by hand	22,000 Pa, well under the Saros 20's 36,000, at a higher price No threshold height, bin or tank capacity on Roborock's page The dock does not refill the water tank
Best for	Homes with a mix of hard floors and carpet Low furniture that a LiDAR turret cannot fit under	Households with children or pets, where the floor is never quite clear Low furniture that a LiDAR turret cannot fit under
Score breakdown
Verdict Score	86/100	85/100
Cleaning	93	93
Navigation	94	90
Mopping	92	92
Obstacle Avoidance	95	95
Automation	89	74
Ease of Use	94	94
Reliability	64	64
Value	43	55
SpecificationsOnly differences In green: the better figure where the direction is beyond argument, such as more lawn or less noise. Where it depends on your home, nothing is marked.
Cleaning
Suction	36,000 Pa	22,000 Pa
Brush system	Tangle-resistant	Tangle-resistant
Side brushes	1	1
Carpet boost	Yes	Yes
Dustbin	Not published	Not published
Navigation
Mapping	Solid-state 3D ToF + camera	Solid-state 3D ToF + camera
Obstacle avoidance	Camera + depth sensor	Camera + depth sensor
Saved floor plans	Not published	Not published
Threshold climb	45 mm	Not published
Mopping
Mop type	Twin spinning pads	Twin spinning pads
Mop lift	Detaches for carpet	Detaches for carpet
Extending mop	Yes	Yes
Water tank	Not published	Not published
Dock
Self-emptying	Yes	Yes
Mop washing	Yes	Yes
Mop wash temperature	100 °C	80 °C
Mop drying	Yes	Yes
Water refill	Yes	No
Plumbed drain	No	No
Dust bag interval	Not published	Not published
Warm-air drying	131 °F / 55 °C	Not published
Detergent dispensing	Automatic	Not published
Software
No-go zones	Yes	Yes
Pet waste recognition	No	No
Power
Battery	Not published	6,400 mAh
Runtime	Not published	Not published
Charging time	Not published	Not published
Connectivity
Wi-Fi	Yes	Yes
Bluetooth	Yes	Yes
4G / LTE	No	No
Voice control	Yes	Yes
Physical
Weight	Not published	Not published
L × W × H	Not published	353 × 350 × 80 mm
Noise	Not published	Not published
Support
Warranty	12 months	12 months
Released	2025	2025
Chassis
Carpet pile cleared	1.18 in / 30 mm	Not published
Obstacles
Recognised object types	300+	Not published
Arm
OmniGrip mechanical arm	Not published	Five-axis, foldable; lifts socks, slippers, tissues, small toys

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