Roborock Saros Z70 vs Saros 20
Roborock Saros Z70
LiDAR · 22,000 Pa · OmniGrip arm · ~CAD $1,499
Roborock Saros 20
LiDAR · 36,000 Pa · Sonic mop · ~CAD $1,799+
Two premium LiDAR flagships from the same brand. Both run year-round in Canadian winters without schedule adjustments. The Z70 adds a robotic arm that picks up floor clutter. The Saros 20 adds 64% more suction and sonic mopping. The question is which problem your home has.
Saros Z70 wins when
Floor clutter is the daily problem
OmniGrip arm picks up socks, towels, pet toys, and cables before vacuuming — removes the floor prep step for most households. $300 less than the Saros 20. Best for families, pet homes with toy scatter, and anyone who frequently finds laundry on the floor.
Saros 20 wins when
Maximum cleaning performance is the priority
36,000 Pa extracts more on thick carpet. Sonic mopping scrubs tile and hardwood residue harder. StarSight obstacle avoidance handles low-light situations better. Best for heavy pet shedding on thick carpet, or homes where tile mopping quality matters most.
What both robots share
Both use LiDAR navigation — year-round scheduling in complete darkness, no Canadian winter adjustments needed. Both have auto-empty bases and auto-wash mop docks. Both use the same Roborock app. The navigation reliability advantage over camera-based competitors (Dreame, Eufy, Narwal) applies equally to both.
Head-to-Head Comparison
| Category | Saros Z70 | Saros 20 | Edge |
|---|---|---|---|
Suction 36,000 Pa makes a real difference on thick carpet and heavy pet hair | 22,000 Pa — high tier | 36,000 Pa — highest available | Saros 20 |
Navigation StarSight adds better obstacle avoidance in low light; both handle year-round Canadian scheduling | LiDAR — year-round, complete darkness | LiDAR + StarSight — structured light + camera | Saros 20 |
Object pickup The Z70's defining feature — the Saros 20 has no equivalent | OmniGrip arm — picks up socks, towels, cables before vacuuming | None — avoids or pushes floor obstacles | Z70 |
Mopping Sonic mopping scrubs tile residue harder than rotating pads | Auto-wash dock — standard rotating pads | Sonic mopping + auto-wash dock | Saros 20 |
Canada price Z70 is typically $300+ less expensive | ~CAD $1,499 | ~CAD $1,799+ | Z70 |
Carpet performance On most Canadian carpet (medium pile), both are excellent; gap widens on thick-pile | 22,000 Pa — strong on medium-to-thick carpet | 36,000 Pa — strongest available on very thick carpet | Saros 20 |
Hard floor mopping Homes with kitchen tile where mopping quality matters: Saros 20 | Auto-wash dock — solid maintenance mopping | Sonic mopping + auto-wash — better on tile residue and grease | Saros 20 |
App + ecosystem Identical app, identical scheduling, identical ecosystem | Roborock app — same as Saros 20 | Roborock app — same as Z70 | Tie |
Canada availability | Amazon.ca — 2026 launch | Amazon.ca — established | Tie |
The OmniGrip Arm in Practice
The Z70's arm picks up soft, graspable items — socks, small towels, charging cables (when loosely coiled), pet toys, underwear, t-shirts — and deposits them in an onboard compartment before the vacuum run begins. Items transfer to a collection bin in the dock when the robot returns. You empty the collection bin separately from the dustbin, typically weekly.
The arm is less reliable on rigid objects — small toys, coins, bottle caps, shoes — where grip geometry is harder. Roborock describes it as optimized for soft items, and that's an accurate description. For the most common floor clutter category in family and pet homes (laundry, soft toys, cables), it performs well.
The practical question is how often your household needs to clear the floor before a robot run. If the answer is “rarely — floors are mostly clear”, the arm adds cost without changing your experience. If the answer is “frequently — we always need to pick up before running the robot”, the arm directly addresses your actual problem.
When 36,000 Pa vs 22,000 Pa Actually Matters
On hard floors — tile, hardwood, laminate — the suction difference between 22,000 Pa and 36,000 Pa is not detectable. Hard floor debris doesn't require high suction to lift. On low-pile and medium-pile carpet (under 25mm), both robots extract debris and pet hair equally thoroughly in practice. The suction gap becomes relevant on thick-pile carpet (25mm+) and very thick carpet (40mm+), where the Saros 20's 36,000 Pa pulls embedded pet hair and debris from deeper in the pile.
For most Canadian homes with standard bedroom carpet and living room carpet, the Z70's 22,000 Pa is sufficient and the suction advantage of the Saros 20 won't be noticeable in daily use. For homes with multiple heavy-shedding pets on thick-pile carpet, the Saros 20's suction advantage is genuine and worth the premium.