Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Roborock - S8 Pro Ultra | Yeedi - Cube |
|---|---|---|
| Suction | 6000 Pa | 8000 Pa |
| Water tank | 180 ml | 230 ml |
| Noise | 67 dB | 65 dB |
| AI obstacle avoidance | true | false |
Between the S8 Pro Ultra and Cube, the S8 Pro Ultra comes out ahead in ai obstacle avoidance, while the Cube wins on suction / water tank. Overall, the S8 Pro Ultra scores 79 and the Cube scores 80.1 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (79 vs 80.1). The decision is not about overall quality — both clear the bar — it is about which specific trade-offs fit your use.
Pick the S8 Pro Ultra if you care most about ai obstacle avoidance. The biggest gaps in its favor are ai obstacle avoidance. The single most decisive one: Has AI obstacle avoidance.
Pick the Cube if you care most about suction / water tank. Its strongest claims are suction, water tank, noise. The single most decisive one: Suction — 33.33% more. 8000 Pa vs 6000 Pa.
Both ship with comparable mopping, lidar, battery life, so those specs do not separate the two — focus on the differences below.
Bottom line: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity says both are well-rounded; the differences are about trade-offs, not quality.
Which should you buy: Roborock - S8 Pro Ultra or Yeedi - Cube?
Yeedi - Cube leads the current Mars Score by 1.1 points.The more useful decision is the trade-off behind that result: compare suction against the way you will actually use the product.
Choose Roborock - S8 Pro Ultra if…
Roborock - S8 Pro Ultra has the measurable edge on has ai obstacle avoidance.
Choose Yeedi - Cube if…
Yeedi - Cube has the measurable edge on suction pa, water tank capacity ml, noise db.
This is a structured comparison of the published catalog values. It is not a claim of identical real-world performance across every workload; use the linked spec drill-downs and methodology page to inspect the inputs.
Why Roborock - S8 Pro Ultra wins
- ▲Has AI obstacle avoidance.
Why Yeedi - Cube wins
- ▲Suction — 33.33% more. 8000 Pa vs 6000 Pa.
- ▲Water tank — 27.78% more. 230 ml vs 180 ml.
- ▲Noise — 2.00 dB less. 65 vs 67.
Spec comparison
Cleaning
| Spec | Roborock - S8 Pro Ultra | Yeedi - Cube |
|---|---|---|
| Suction | 6000 Pa | 8000 Palead |
| Mopping | true | true |
| Water tank | 180 ml | 230 mllead |
| Dustbin | 400 mllead | 300 ml |
| Carpet detection | true | true |
Navigation
| Spec | Roborock - S8 Pro Ultra | Yeedi - Cube |
|---|---|---|
| Lidar | true | true |
| Camera navigation | truelead | false |
| AI obstacle avoidance | truelead | false |
| Max climb | 20 mm | 20 mm |
Autonomy
| Spec | Roborock - S8 Pro Ultra | Yeedi - Cube |
|---|---|---|
| Battery life | 180 min | 180 min |
| Self-empty base | true | true |
| Self-wash mop | true | true |
| Self-dry mop | true | true |
| Noise | 67 dB | 65 dBlead |
Frequently asked
Which has stronger suction, S8 Pro Ultra or Cube?+
Cube delivers 8000 Pa vs 6000 Pa.
Do S8 Pro Ultra or Cube mop?+
Both can mop.
Which has a self-emptying base, S8 Pro Ultra or Cube?+
Both ship with a self-emptying base.