Introduction
Some comparisons are about picking a winner. This one is more about which robot disappoints less. The Aiper Seagull 600 and the Dolphin Nautilus CC Plus both pitch themselves as budget-savers next to premium models. I bought both, tested them, and honestly, they each fall short in ways that matter.

The Seagull 600 is cheap, but it left me wanting more. It can't clean walls, and its flat filter barely does its job. Weak motors and no active brush meant it missed spots and left debris behind. My full review gets into all the specifics.
The Dolphin Nautilus CC Plus underwhelmed too. It does climb walls, but it struggles with the waterline and skips the NanoFilters you'd find on pricier Dolphins. Its dated Gen-1 filters and missing HyperBrush cap what it can do. My review covers exactly where it falls behind the rest of the Dolphin lineup.

Both looked fine on paper, but hands-on testing turned up plenty of flaws. If you're eyeing either one, you need to know their limits going in. My deep dives are meant to help you decide, and maybe save you from a costly mistake.
If you want reliable alternatives, I'd point you to the Dolphin Cayman or the Dolphin Quantum. Both clean better and pack more features, so your pool stays clean without the headaches.

Read my full reviews for the strengths and weaknesses of each. Whether you're after budget-friendly or premium, I've got you covered with real detail and honest picks.
Stick with my team for the best products and methods to keep your pool clean. For more top-tier options, check my guide to the best pool robots.
How We Test
For every robot review, I run it hard for three months. That's how I get accurate, thorough insight into how it really performs. I focus on the same three things: pool coverage, filtration, and the feature set and warranty.
Testing the Aiper Seagull 600, I watched how well it covered the floor. It didn't go well. With no navigation system and weak motors, it's just not good at floor cleaning. It kept getting stuck or cleaning the same patch over and over.

On filtration, my tests showed the Seagull 600's flat filter is subpar. It couldn't catch fine particles and needed frequent cleaning as debris piled up at the bottom of the unit. Robots like the Dolphin Escape filter far more reliably.
The biggest issue was the feature set. No active brush, plus a short battery that needs a daily charge, are real drawbacks. And the one-year warranty doesn't inspire much long-term confidence.

With the Dolphin Nautilus CC Plus, I wanted to see if it lived up to newer, pricier models. It cleans floors and walls, but it clearly failed at the waterline.
The CC Plus also lacks the NanoFilters you need for fine debris and clarity. There's a real performance gap here compared to robots like the Dolphin Quantum, which has advanced filter options.

The CC Plus does have a programmable timer, but its Gen-1 filters and missing HyperBrush cap its cleaning. I felt those gaps clearly in hands-on use.
Three months made both robots' shortcomings obvious on efficiency, performance, and convenience. If you're considering either, weigh those limits carefully. For a better buy, look at alternatives like the Dolphin Premier and Aquabot REVA, which clean better and offer more.

All told, my reviews keep coming back to one point: buy a robot that's reliable, well-featured, and covers the pool properly. Read my full reviews to decide, and see my guide to the best pool robots for more picks.
Coverage
Coverage is one of the most important things to weigh with the Aiper Seagull 600 and the Dolphin Nautilus CC Plus. The Seagull 600 scored a 2 out of 5, reflecting that it only cleans the floor. Its tiny plastic wheels and weak motors keep it on flat ground, so it can't climb walls or handle inclines.
The Dolphin Nautilus CC Plus did better in my testing, at 3.5 out of 5. It cleans floors and walls thanks to rubber tracks and dual scrubbing brushes. It doesn't reach the waterline, though, which is a real drawback for a thorough clean.

Because the Seagull 600 has no navigation system, it wanders, gets stuck, and misses a lot of the pool. That means the same spots get cleaned twice while plenty of debris gets left behind. The weak motors also mean it can't lift heavier debris, which further limits it.
The Dolphin Nautilus CC Plus cleaned on a calculated path, covering the floor and walls better than the Seagull 600. But it couldn't hold position at the waterline, one of the most common problem areas, so you'd still have to scrub that strip by hand. That cuts into its overall convenience.

"How much of the pool a robot actually reaches decides whether it's worth owning."
Comparing scores, the CC Plus edges the Seagull 600 on coverage, reflecting its ability to navigate and clean more of the pool. Neither one nails full coverage, but the CC Plus is the more complete of the two.
If coverage is your top concern, the Dolphin Escape and Dolphin Cayman are the alternatives I'd recommend. Both clean all pool surfaces reliably, without the big gaps I saw in the Seagull 600 and Nautilus CC Plus.

For a deeper look, check my detailed articles like the Dolphin Quantum, which stands out on navigation and cleaning efficiency. My reviews aim to give you what you need to pick the right robot.
Filters
Filtration on the Aiper Seagull 600 and the Dolphin Nautilus CC Plus is a real contrast. It comes down to how well each catches debris, keeps water clear, and how easy it is to maintain.
The Seagull 600 uses a basic flat filter with clear limits. It can't catch fine debris efficiently, and it leaves debris at the bottom of the unit, so you're cleaning it constantly. That inefficiency is a serious weak point, especially next to more advanced robots.

The Dolphin Nautilus CC Plus uses a standard fine filter. It's a step up from the Seagull 600's flat filter, but it still can't catch ultrafine particles. The missing NanoFilters are a real drawback for water clarity.
In hands-on use, the CC Plus was clearly better at basic debris removal than the Seagull 600. But it still struggled with the fine particles that cloud water. That gap shows why advanced filter options matter in a robot.

"For truly clear water, advanced filtration isn't optional. Both of these skip it."
Neither the Seagull 600 nor the CC Plus hits great filtration. The Dolphin Quantum, with its NanoFilters and larger basket, is the better answer if you want real clarity and debris removal.

So the CC Plus is the better of these two, but if optimal filtration and clarity are the goal, the Dolphin Quantum is the pick. Its NanoFilters and more efficient system set it apart.
For the full strengths and weaknesses of each, read my detailed reviews. Making the right call keeps your pool clean and low-hassle. For more picks, see my guide to the best pool robots.
Feature Set
The feature sets of the Aiper Seagull 600 and the Dolphin Nautilus CC Plus differ in ways that really shape how usable each one is. Let me start with the Seagull 600.
The Seagull 600's headline is its cordless design, meant to cut the hassle of a cable. Nice in theory, but it falls apart in practice. Long charge times and weak motors kill the convenience. You recharge it every day for a 90-minute cycle, which just isn't practical.

No active brush hurts it further. Without navigation software, it cleans the same area repeatedly and misses others entirely. Given all that, its low 2/5 feature score is no surprise.
The Dolphin Nautilus CC Plus, by contrast, has features that boost usability. The standout is its programmable timer, so you can set cleaning schedules (daily, every other day, or every three days) for a more hands-off routine.

The CC Plus has dual scrubbing brushes and rubber tracks, so it cleans floors and walls well. It does miss waterline cleaning, which is a real gap given how important that area is. Even so, it scores a respectable 3.5/5 on features.
"With pool robots, the feature set is usually what makes or breaks the whole thing."
On features, the CC Plus clearly beats the Seagull 600. The Seagull's features aim at entry-level convenience but fall down on real inefficiencies like daily recharging and no navigation. The CC Plus is a more robust cleaner with its timer and dual brushes, even though it misses advanced features like waterline cleaning and NanoFilters.

On usability, the CC Plus is the friendlier, more efficient robot. Scheduling cuts down on manual work, while the Seagull 600's daily-recharge routine makes it much less convenient.
Looking at the scores, the CC Plus comes out ahead for its better performance and features. It's not perfect, but it's the more reliable cleaner compared to the Seagull 600 with its thin feature set and practical headaches.

Overall, both aim for cost-effective cleaning, but the CC Plus is the better pick with a 3.5/5 feature score against the Seagull 600's 2/5. For even better options, look at the Dolphin Premier or the Aquabot REVA, both of which bring advanced features and stronger cleaning.
Conclusion
To wrap up, both the Aiper Seagull 600 and the Dolphin Nautilus CC Plus came up short of what I hoped for.
The Seagull 600, with its low price and cordless design, scored an overall 4/10. Floor-only coverage, a weak flat filter, and short battery life make it a poor choice for a thorough clean.

The Dolphin Nautilus CC Plus did a bit better at 6/10. It cleans floors and walls, but skipping the waterline and NanoFilters really hurts it. Dated Gen-1 filters and the missing HyperBrush cap it further.
Even though the Dolphin Nautilus CC Plus edges out the Seagull 600 head to head, both fall short of a genuinely complete clean.

For reliable alternatives, the Dolphin Quantum and Dolphin Premier clean better and offer more. Both have stronger filtration and better coverage, so your pool stays clean with minimal effort.
In short, the Seagull 600 and CC Plus have their merits but ultimately don't deliver the complete clean you want. I'd point you to something like the Dolphin Quantum for a more efficient, user-friendly solution. Check out my guide to the best pool robots for more top options.

In the end, a smart choice means your robot actually pays off with a clean, easy-to-maintain pool. Explore my detailed reviews for a closer look at each model and pick the best fit for your pool.
Alternate Robots
The Aiper Seagull 600 and Dolphin Nautilus CC Plus left me wanting more, so let me point you to two robots that held up much better in testing, with stronger cleaning and more features.
One standout is the Dolphin Cayman. It's great on coverage and filtration, making it an excellent choice for a thorough clean. Its programmable timer lets you set the schedule and forget it, and with strong motors and a large MaxBin filter, it keeps the pool clean with minimal effort.

Compared to the Seagull 600 and CC Plus, the Cayman is more complete and better-featured. Optional NanoFilters boost its filtration for fine debris and clarity. It cleans floors and walls, and with strong suction it's a top contender in the robot market.
Another one I'd flag is the Dolphin Escape. Aimed at above-ground pools, it performs well with its HyperBrush, strong motors, and SmartNav 2.0. It maps the pool and avoids getting stuck, so it cleans efficiently every time.

"Smarter tech and better features are exactly what these two budget robots are missing."
The Escape's large basket and optional NanoFilters help keep the pool spotless. Unlike the Seagull 600 and CC Plus, its powerful scrubbers clear debris and algae effectively. Its energy-efficient motors also save you money while still cleaning well.
If you want thorough cleaning and better features, the Dolphin Cayman and Dolphin Escape are excellent picks. Both do far more than the Seagull 600 and Nautilus CC Plus for a better maintenance experience.

Bottom line, if you want a reliable, efficient robot, look at the Dolphin Cayman or the Dolphin Escape. For more top options, see my guide to the best pool robots.