Cordless Vacuums / Dyson V15s Detect Submarine vs Roborock F25 Ultra
Dyson V15s Detect Submarine vs Roborock F25 Ultra
Dyson V15s Detect Submarine
A great dry vacuum with a mop head bolted on — and no self-clean cycle at all.
Wins overall by 0.1 points
Quick Verdict
The Dyson V15s Detect Submarine wins by 0.1 points, which is not enough to settle it. The only washer here that self-cleans with genuinely hot water and steam. Pick on the specs that matter to you, not the overall score.
The Dyson V15s Detect Submarine and Roborock F25 Ultra are both closely matched cordless Vacuum models, and the Roborock F25 Ultra is $279 cheaper than the Dyson V15s Detect Submarine ($599.99 vs $879). On Maintenance & Emptying, the Roborock F25 Ultra leads (9.5 vs 5.0/10) — bin or tank emptying, whether your hand ends up near the dust, self-clean quality and the ongoing cost of filters, bags and detergent. On Battery System, the Dyson V15s Detect Submarine leads (8.5 vs 4.0/10) — removable or sealed, how many packs are included, what a spare costs and whether the pack is shared across a range. On Filtration & Sealing, the Dyson V15s Detect Submarine leads (9.5 vs 5.5/10) — whether the whole machine is sealed or a HEPA element simply sits inside a leaky body, and what the claimed rating is actually measured at. Overall, the Dyson V15s Detect Submarine scores 7.0/10 across our 8 scoring categories versus 6.9/10 for the Roborock F25 Ultra, though the gap is close enough that your specific use case should decide it. Below, we break down the full spec sheet, category-by-category scores, and exactly who should buy which one.
Side-by-Side Comparison
| Spec | Dyson V15s Detect Submarine | Roborock F25 Ultra |
|---|---|---|
| Price | $879.00 | $599.99 |
| Release Year | 2023 | 2025 |
| Machine Type | Dry cordless stick vacuum with a swappable wet roller head — not a dedicated floor washer | Cordless wet-dry hard-floor washer with steam |
| Suction (as published) | 240 air watts. Dyson publishes air watts rather than Pa or motor watts | 22,000 Pa. Roborock publishes Pa only — there is no air-watt figure, so it is not comparable with the dry sticks |
| Runtime, Eco / Headline (min) | 60 | 60 |
| Runtime, Max Power (min) | Not published by the manufacturer — Dyson quotes only 'up to 60 minutes' | Not published by the manufacturer. VacuumWars measured roughly 15-25 minutes in the steam and hot-water modes against up to 60 in Auto |
| What the Runtime Claim Actually Means | The 60-minute figure is Eco with a non-powered tool. Dyson publishes no Boost figure and no wet-mode figure, and the Submarine head has its own motor that drains the pack faster than the dry heads | Auto mode is up to 60 minutes. Heating water to 187°F or generating 356°F steam is what actually drains the pack, and Roborock publishes no figure for either — the heated modes are the ones people buy this for |
| Removable Battery | Yes — tool-free click-in battery. A second battery is sold separately and is not in the box | Not published by the manufacturer — Roborock does not describe the pack as user-removable |
| Spare Battery | $99.99 for the genuine Dyson click-in pack | Not published by the manufacturer |
| Dock / Wall Mount | Wall-mounted docking station included (drilling required), plus a drip tray for the wet head. No auto-empty, no self-clean dock | Self-cleaning charging dock included |
| Filtration | Whole-machine sealed filtration; 99.99% at 0.3 micron claimed in Boost mode | Washable filters on the dirty-water separation module. Roborock makes no HEPA claim and no sealed-system claim |
| Bin / Tank Capacity | 0.77 L dust bin; the Submarine head carries 0.3 L clean water and 0.36 L dirty water | 1.0 L clean water tank; dirty-water tank with a detachable solid/liquid separation module |
| Weight (lbs) | 8.3✓ | 12.1 |
| Filters, Consumables & Self-Clean | There is no self-clean cycle. The Submarine roller and both water tanks are rinsed by hand after every wet use. Replacement wet rollers are sold as Dyson spares | The only washer here whose self-clean genuinely uses heat: 194°F water and 356°F steam on the roller, then about 5 minutes of 203°F hot-air drying, with anti-scale protection Roborock rates for three years. The dirty tank is still emptied by hand, but the separation module strains the hair out first so your hand stays clear of the slurry. Detergent auto-dispenses from Roborock's own solution; third-party compatibility is not published |
| Warranty | 24 months | 12 months |
| Colors | Yellow/Nickel | Black |
Category Scores
Suction Power
The Dyson V15s Detect Submarine leads clearly here, 9.5 against 8.0 — a 1.5-point margin on actual cleaning force at the head, judged on air watts where a maker publishes them and discounted where only Pa or motor watts are quoted. If that is what you are buying for, the Roborock F25 Ultra does not close the gap elsewhere.
Sustained Runtime
The Roborock F25 Ultra leads clearly here, 6.0 against 3.5 — a 2.5-point margin on how long the machine really runs on max power with the motorised floor head attached — not the eco-mode, bare-tool figure on the box. If that is what you are buying for, the Dyson V15s Detect Submarine does not close the gap elsewhere.
Filtration & Sealing
The Dyson V15s Detect Submarine leads clearly here, 9.5 against 5.5 — a 4.0-point margin on whether the whole machine is sealed or a HEPA element simply sits inside a leaky body, and what the claimed rating is actually measured at. If that is what you are buying for, the Roborock F25 Ultra does not close the gap elsewhere.
Handling & Ergonomics
The Roborock F25 Ultra leads clearly here, 6.5 against 5.5 — a 1.0-point margin on weight, balance, whether power is a push-button or a trigger you must hold, and how it stores. If that is what you are buying for, the Dyson V15s Detect Submarine does not close the gap elsewhere.
Maintenance & Emptying
The Roborock F25 Ultra leads clearly here, 9.5 against 5.0 — a 4.5-point margin on bin or tank emptying, whether your hand ends up near the dust, self-clean quality and the ongoing cost of filters, bags and detergent. If that is what you are buying for, the Dyson V15s Detect Submarine does not close the gap elsewhere.
Battery System
The Dyson V15s Detect Submarine leads clearly here, 8.5 against 4.0 — a 4.5-point margin on removable or sealed, how many packs are included, what a spare costs and whether the pack is shared across a range. If that is what you are buying for, the Roborock F25 Ultra does not close the gap elsewhere.
Versatility
The Dyson V15s Detect Submarine leads clearly here, 9.0 against 7.5 — a 1.5-point margin on handheld conversion, above-floor tools, carpet capability and wet-mopping ability. If that is what you are buying for, the Roborock F25 Ultra does not close the gap elsewhere.
Value
The Roborock F25 Ultra leads clearly here, 8.0 against 5.5 — a 2.5-point margin on what you actually get for the street price once consumables and missing accessories are counted. If that is what you are buying for, the Dyson V15s Detect Submarine does not close the gap elsewhere.
Best For
Choose the Dyson V15s Detect Submarine if…
- • Battery System matters most to you — the Dyson V15s Detect Submarine scores 8.5/10 here (removable or sealed, how many packs are included, what a spare costs and whether the pack is shared across a range).
- • Filtration & Sealing matters most to you — the Dyson V15s Detect Submarine scores 9.5/10 here (whether the whole machine is sealed or a HEPA element simply sits inside a leaky body, and what the claimed rating is actually measured at).
- • Your main use case is allergies.
Choose the Roborock F25 Ultra if…
- • Maintenance & Emptying matters most to you — the Roborock F25 Ultra scores 9.5/10 here (bin or tank emptying, whether your hand ends up near the dust, self-clean quality and the ongoing cost of filters, bags and detergent).
- • Sustained Runtime matters most to you — the Roborock F25 Ultra scores 6.0/10 here (how long the machine really runs on max power with the motorised floor head attached — not the eco-mode, bare-tool figure on the box).
- • Value matters most to you — the Roborock F25 Ultra scores 8.0/10 here (what you actually get for the street price once consumables and missing accessories are counted).
- • You want to spend less — it's $279 cheaper.
Pros & Cons
Dyson V15s Detect Submarine
Pros
- +One machine covers deep dry vacuuming and wet mopping, so you are not storing two appliances
- +The wet roller is genuinely effective on dried-on stains, and the two-tank design keeps dirty water off the floor
- +Identical 240 air watts and sealed filtration to the standard V15 Detect — the dry half is not compromised
- +Cheapest spare battery of any flagship here at $99.99
Cons
- −The Submarine head is a poor vacuum: it does not pick up dry debris or large spills well, so you must vacuum first and then mop
- −No self-clean cycle at all — the roller and both tanks get washed by hand every time, which is exactly what a Tineco or Roborock does for you
- −Trigger-hold operation, and 1.5 lb heavier than the standard V15 Detect
- −$1,049.99 list, and the Submarine head fits no other Dyson and cannot be bought as an add-on
Roborock F25 Ultra
Pros
- +The self-clean actually uses heat — 194°F water and 356°F steam on the roller, then 203°F drying — where Tineco's and Bissell's use cold tank water
- +356°F steam lifts dried-on grease that a plain wet roller simply smears around
- +The detachable separation module means emptying the dirty tank does not put your fingers into hair slurry
- +22,000 Pa, 180° lay-flat and an auto detergent dispenser you refill roughly monthly
Cons
- −12.1 lb is the heaviest machine on this page and you feel it before the tank is empty
- −Roborock publishes no runtime for the steam or hot-water modes, which are the modes that justify the price
- −Only a 1-year warranty against Shark's 5 and Miele's 2
- −No air-watt figure, no HEPA claim, and on carpet it is no substitute for a dry stick vacuum
Shop by Need
FAQs
Is the Dyson V15s Detect Submarine or Roborock F25 Ultra better overall?+
Based on our 8-category scoring, the Dyson V15s Detect Submarine comes out ahead overall. See the full breakdown in the scores section above — the right pick still depends on which categories matter most for your use case.
Which is better for Maintenance & Emptying, the Dyson V15s Detect Submarine or the Roborock F25 Ultra?+
The Roborock F25 Ultra scores higher on Maintenance & Emptying (9.5/10 vs 5.0/10) — bin or tank emptying, whether your hand ends up near the dust, self-clean quality and the ongoing cost of filters, bags and detergent.
Which is better for Battery System, the Dyson V15s Detect Submarine or the Roborock F25 Ultra?+
The Dyson V15s Detect Submarine scores higher on Battery System (8.5/10 vs 4.0/10) — removable or sealed, how many packs are included, what a spare costs and whether the pack is shared across a range.
Which is better for Filtration & Sealing, the Dyson V15s Detect Submarine or the Roborock F25 Ultra?+
The Dyson V15s Detect Submarine scores higher on Filtration & Sealing (9.5/10 vs 5.5/10) — whether the whole machine is sealed or a HEPA element simply sits inside a leaky body, and what the claimed rating is actually measured at.
Which is better for Sustained Runtime, the Dyson V15s Detect Submarine or the Roborock F25 Ultra?+
The Roborock F25 Ultra scores higher on Sustained Runtime (6.0/10 vs 3.5/10) — how long the machine really runs on max power with the motorised floor head attached — not the eco-mode, bare-tool figure on the box.
Is the Dyson V15s Detect Submarine worth the price difference over the Roborock F25 Ultra?+
The Roborock F25 Ultra is the cheaper option at $599.99 versus $879. Whether the pricier model is "worth it" depends on how much you value its lead in Maintenance & Emptying.
Which is better suited to my use case?+
The Dyson V15s Detect Submarine is the better fit if you mainly care about allergies. The Roborock F25 Ultra is the better fit for hard-floors or wet-dry.
What's the warranty on the Dyson V15s Detect Submarine vs the Roborock F25 Ultra?+
The Dyson V15s Detect Submarine ships with a 24-month warranty; the Roborock F25 Ultra ships with a 12-month warranty. Always confirm current terms on the manufacturer's site before buying.
Should I wait for the next model instead of buying either of these?+
If either model is more than two years old, a successor may be close — check the "Latest Model" link on each product page. Otherwise, both are current, well-supported options and there's no strong reason to wait.
Cheaper Option
Tineco FLOOR ONE S7 Stretch Ultra — $449.00
Specifications and prices for both products last verified . Scores are calculated from published specifications — see how we compare products.