The Dolphin Nautilus CC Supreme and Dolphin Nautilus CC Plus are sister robots from Maytronics, and they both look the same. Of the two, the Dolphin Nautilus CC Plus automatic robotic pool cleaner is the simpler and less sophisticated device since it uses only 2 side roller brushes to wash the pool and has fewer connectivity options. The Dolphin Nautilus CC Supreme has 3 cleaning modes while the Dolphin Nautilus CC Plus automatic robotic pool cleaner has just 1; standard 2-hour cleaning cycle, no Quick Clean, and Extended Clean.