We have tested both the Clear S and the Dolphin Nautilus CC in real pools, measured their suction at the intake, and lived with the filtration and daily routine each one requires. This comparison brings those results together so you can see the real-world trade-offs without relying on the numbers printed on either box.
Both use corded power, so this matchup turns on measured pull, filtration, coverage, automation, and value.
The short answer: Clear S is our pick. It matches the Clear UV at 2.09 PSI and keeps the same filtration and coverage for less. Dolphin Nautilus CC still has a clear case: it is the better fit for strict budgets and light debris where basic floor and wall cleaning is enough.
Quick Answer
Buy the Clear S when its strengths match your pool. Best for: buyers who want Clear's cleaning performance at the lower price. It is the stronger choice across the measurements and ownership factors that matter in our testing.
Choose the Dolphin Nautilus CC instead when its narrower advantages matter more to you. Best for: strict budgets and light debris where basic floor and wall cleaning is enough. It removes daily charging from the equation and covers the core floor-and-wall job.
Our calls in the full reviews are Recommended for the Clear S and Decent, but there are better buys for the Dolphin Nautilus CC. Those calls matter here: PSI is the first round, not the entire verdict.
Suction Power: 2.09 PSI vs 0.8 PSI
On our hydro manometer, the Clear S measured 2.09 PSI and the Dolphin Nautilus CC measured 0.8 PSI. That gives the Clear S a 1.29 PSI advantage, or about 161% more intake pressure than the lower reading.
We measure pressure directly at the intake with the same gauge and pool setup. That is different from manufacturer flow-rate claims in gallons per hour: GPH describes water movement, while PSI shows how hard the intake pulls on debris. Cordless results are recorded at full charge. Our complete pool-robot suction test explains the method and shows where both robots sit on the full board.
The number needs context. It matches the Clear UV at 2.09 PSI and keeps the same filtration and coverage for less. It removes daily charging from the equation and covers the core floor-and-wall job. The stronger gauge result gets this round, though intake pressure alone cannot make up for a filter that lets fine debris escape or a routine that makes you handle the robot every day.
Filtration and Debris Handling
The Clear S uses high-surface-area ultrafilter rated around one micron. The Dolphin Nautilus CC uses basic mesh basket with no nanofilter option.
We give the filtration edge to the Clear S. Our comparison favors fine-particle capture, usable debris capacity, easy cleaning, and whether the better filter is included rather than sold as an upgrade.
For leaves, capacity and intake design matter. For pollen, silt, and the haze that dulls otherwise clear water, the filter media matters more. A basic mesh screen can look clean after a run while still passing the smallest material back into the pool.
Automation and Daily Work
The Clear S is corded. App and power-supply controls with scheduled corded cleaning. The Dolphin Nautilus CC is corded. Simple corded start button without a weekly timer.
Because both are corded, neither needs a recharge. The meaningful question is how much scheduling and remote control each power supply or app provides.
The automation round goes to the Clear S.
Coverage and Pool Fit
For the Clear S, our review found floor, walls, and waterline with the same cleaning platform as the clear uv. The Dolphin Nautilus CC is built for floor and wall cleaning for standard pools.
The Clear S wins the coverage round on the breadth of surfaces and pool situations it can handle.
This is where the runner-up can still be the smarter fit for specific pools. A compact pool does not benefit from paying for reach it cannot use, while a pool with a sun shelf, long waterline, or heavy leaf load can expose the limits of a simpler machine quickly.
Value: Performance for the Money and Time
Our value take on the Clear S: The value-focused Clear: the same measured pull as the UV model without paying for the lamp. For the Dolphin Nautilus CC: A basic entry point, but stronger and smarter options cost only a little more.
The value edge goes to the Clear S.
Value is not the same thing as the lowest checkout price. We count cleaning power, filtration, how many surfaces the robot covers, and how often you have to retrieve or charge it. A cheaper robot that leaves you vacuuming behind it is not a bargain, and an expensive robot only earns its price when its extra capability solves a real problem in your pool.
Which One Should You Buy?
- Buy the Clear S when its strengths fit your pool. Best for: buyers who want Clear's cleaning performance at the lower price. It matches the Clear UV at 2.09 PSI and keeps the same filtration and coverage for less.
- Choose the Dolphin Nautilus CC instead when its specific trade-off fits better. Best for: strict budgets and light debris where basic floor and wall cleaning is enough. It removes daily charging from the equation and covers the core floor-and-wall job.
- Know the main drawback: Clear S — It does not include the UV-C feature that distinguishes the Clear UV. Dolphin Nautilus CC — Its 0.8 PSI reading, basic mesh, and missing timer put it at the bottom of the corded field.
Final Verdict
Clear S wins this comparison. Clear S wins the overall matchup. It matches the Clear UV at 2.09 PSI and keeps the same filtration and coverage for less. Dolphin Nautilus CC remains the better fit for strict budgets and light debris where basic floor and wall cleaning is enough.
Read the complete Clear S review and Dolphin Nautilus CC review for every test photo, setup detail, and long-form ownership note. You can also return to all pool-robot comparisons to see any other matchup from the 19 cleaners in our test set.
