We put the Dyson V15 Detect Submarine (V15 Detect Submarine) head-to-head against the Roborock S8 Pro Ultra (S8 Pro Ultra). Below: detailed spec comparison, pros and cons, and our verdict on which is the better buy right now.
Spec Comparison
| Dyson V15 Detect Submarine | Roborock S8 Pro Ultra | |
|---|---|---|
| Runtime | 60-70 min | ~180 min |
| Dustbin | 0.77 L | 350 mL (self-empties to dock) |
| Suction | 230 AW | 6000Pa |
| Filter | Fully-sealed HEPA | Washable E11 HEPA |
| Navigation | Handheld (manual) | LiDAR + ReactiveAI 2.0 |
| Coverage | Up to 1,000 sq ft per charge | Whole home LiDAR mapped |
| Weight | 3.5 kg | 4.4 kg |
| Smart Features | LCD screen with particle count + run time | Reactive 3D obstacle avoidance, auto-empty/wash/refill dock |
Pros & Cons
Dyson V15 Detect Submarine
Pros
- Laser detection is genuinely useful
- Submarine wet head works well
- HEPA filter
- Powerful suction
Cons
- Premium price
- Battery drains fast on Boost
- Trigger-hold to run (tiring)
- Wet head is extra
Roborock S8 Pro Ultra
Pros
- Hot-water mop pad wash is unique
- Mopping actually scrubs (VibraRise)
- Full-base ecosystem
- 6000Pa suction
Cons
- Base is huge (deep footprint)
- App can be complex
- Pricey
- Replacement mops/filters subscription-like cost
Our Verdict
It’s a genuinely close call. Choose the Dyson V15 Detect Submarine if you prioritize raw performance and build. Pick the Roborock S8 Pro Ultra if value-for-money and practical features matter more. Either is a confident buy.
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