When it comes to high-end robotic pool cleaning, two models rise above the rest for in-ground pools: the Dolphin Nautilus CC Supreme vs Dolphin Sigma. Both developed by industry leader Maytronics, these robotic pool cleaners are packed with smart navigation systems, efficient scrubbing power, and advanced filtration technologies. Designed to tackle the toughest cleaning jobs in large residential pools, each of these models brings a distinct set of strengths to the table.
In this in-depth comparison, we explore every major aspect that matters to pool owners—from cleaning coverage and brush systems, to filtration, smart connectivity, handling, and durability. Whether you’re considering upgrading your current pool cleaner or investing in your first top-tier robotic assistant, this guide will help determine whether the Dolphin Nautilus CC Supreme or the Dolphin Sigma is the better fit for your pool and lifestyle.
Contents
Differences Between Dolphin Nautilus CC Supreme vs Dolphin Sigma
Below is a summary of the specifications:
Both the Nautilus CC Supreme and the Sigma utilize SmartNav™ 3.0 technology, allowing for precise scanning and adaptive route optimization. These systems scan the shape and features of your pool and adjust the robot’s path dynamically to ensure maximum coverage without redundancy. However, the Sigma goes one step further by incorporating a 3-axis gyroscope, which gives it an enhanced sense of orientation. This results in smoother turning, better balance on slopes, and improved efficiency around obstacles.
The Nautilus CC Supreme, while not equipped with a gyroscope, still delivers intelligent and efficient navigation, excelling in rectangular and oval-shaped pools. Its real-time algorithm updates ensure broad cleaning with minimal overlap.
Winner: Dolphin Sigma
The addition of gyroscopic balance allows the Sigma to navigate more complex layouts with greater directional accuracy.
Brush Systems and Scrubbing Efficiency
The CC Supreme uses a triple active brush system, including two front high-speed scrubbers and a rear passive brush. These brushes rotate faster than the robot’s forward movement, offering superior dirt agitation and removal from surfaces like vinyl, fiberglass, and plaster. Its front brushes actively spin to lift debris and algae from walls and pool floors, while the rear brush provides additional support.
The Sigma features three high-speed, dual stabilizer brushes that deliver a continuous 360-degree grip and enhanced wall contact. These are slightly more advanced in structure, offering broader contact points during operation and improved cleaning consistency in hard-to-reach areas.
Winner: Dolphin Sigma
With dual stabilizer brush technology, Sigma offers greater surface contact and superior scrubbing performance across the pool.
Filtration System and Debris Management
The Nautilus CC Supreme offers a multi-layer filter basket that can simultaneously trap fine and ultra-fine debris in a single unit. The top-loading design ensures easy access, and the internal layout is built to optimize suction while separating larger particles from fine sediment.
The Sigma, while also top-loading, uses interchangeable filter cartridges that allow users to swap between fine and ultra-fine filters depending on pool conditions. This modularity gives more control over filtration efficiency, especially useful during different seasons when pools may accumulate varied types of debris—from heavy leaves to pollen and dust.
Winner: Dolphin Sigma
The ability to customize filtration gives Sigma the upper hand for pools with fluctuating environmental conditions.
Waterline Cleaning and Vertical Performance
Both robots are fully capable of waterline scrubbing, using high-traction tracks to climb walls and maintain consistent contact at the tile line. The CC Supreme does an excellent job of allocating time to each surface level—floor, wall, and waterline—through its scheduled cycles.
The Sigma, powered by three DC motors and enhanced by its gyroscopic system, maintains tighter orientation and longer wall-contact times. It’s particularly effective at sustaining vertical climbs in deep pools, even on slick or angled walls.
Winner: Dolphin Sigma
Triple-motor drive and better balance enable more effective, prolonged waterline cleaning.
Smart Features and Connectivity
The CC Supreme connects to the MyDolphin™ Plus App via Wi-Fi, allowing full control of cleaning modes, schedules, and robot status. The app is intuitive, letting users adjust the cleaning intensity, monitor runtime, and receive updates from anywhere.
The Sigma takes it one step further with Wi-Fi and Bluetooth dual-connectivity, giving users local control via Bluetooth and remote access via Wi-Fi. This hybrid approach ensures you can always interact with the cleaner, whether you’re standing poolside or away from home.
Winner: Dolphin Sigma
Dual-connectivity offers more flexible control options, especially when remote Wi-Fi access is temporarily unavailable.
Motor System and Energy Efficiency
The Dolphin Nautilus CC Supreme operates with a dual motor system, one for navigation and one for suction and brushing. It’s highly efficient, offering excellent performance while maintaining low power consumption during operation.
The Sigma features a triple motor system, with dedicated motors for navigation, propulsion, and vacuum. This setup allows independent optimization of each function, leading to stronger suction, more stable wall climbing, and balanced movement throughout the cleaning cycle.
Winner: Dolphin Sigma
Independent motor functions ensure smoother, more reliable performance in all pool zones.
Cable and Handling
Both models come with a 60-foot swivel cable, engineered to prevent tangling and enable seamless 360-degree movement. This is essential for larger pools or those with steps, curves, and tanning ledges. Handling is relatively equal between the two, with the Nautilus CC Supreme being slightly lighter.
Both offer optional caddies, which we highly recommend for storage and transport, given their weight and premium status.
Winner: Tie
Both offer identical swivel cable performance and similar portability with optional caddies.
Quick Rundown Of Dolphin Nautilus CC Supreme
Quick Rundown Of Dolphin Sigma
Conclusion
Choose Dolphin Nautilus CC Supreme if you want a smart, Wi-Fi-connected robotic pool cleaner that offers powerful triple-brush cleaning, top-load convenience, and streamlined debris removal in a single cycle. It’s the best choice for users who prefer simplicity, automation, and deep cleaning across standard pool layouts without needing to change filters frequently.
Choose Dolphin Sigma if you’re looking for maximum performance, intelligent navigation, and flexible control. With three motors, gyroscopic navigation, Bluetooth + Wi-Fi control, and the ability to customize filtration, the Sigma stands out as the most adaptable robotic pool cleaner in its class.
Overall Winner: Dolphin Sigma
Thanks to its gyroscope-guided navigation, triple motor design, customizable filtration, and dual smart connectivity, the Dolphin Sigma delivers unmatched power, precision, and control, making it the ultimate robotic pool cleaner for demanding users.