Both robots run the same roller mop system and dual-sensor navigation, so the real split comes down to how they clean and how much the dock does on its own. The Flow 2 pulls harder at 30,000 Pa, adds automatic detergent dispensing and a self-cleaning dock, and lifts its main brush away from wet floors. The original Flow answers with a faster 110 RPM roller mop, a second side brush, and a combo bristle-and-rubber main brush, all for noticeably less money.
Same family, same roller mop, two different ideas about where the effort should go. Narwal built the Flow around a roller mopping system that continuously rinses as it cleans, and the Flow 2 keeps that intact rather than reinventing it. What changed is everything around the edges: more suction, a dock that washes itself and doses detergent, a brush that lifts. What stayed behind is the second side brush and the faster mop roller. So the decision isn't about which generation is better engineered. It's about whether the newer dock automation and extra suction matter more to you than the older model's mopping speed, edge sweeping, and lower price.
Narwal Flow
out of 10Narwal Flow 2
These two land close together. The Flow takes the overall rating 9.1 versus 8.9, with small edges in cleaning (7.8 versus 7.5), navigation (9.0 versus 8.8), and value (9.3 versus 9.1). The Flow 2 nudges ahead on features, 9.6 versus 9.5, which lines up with its detergent dispensing, self-cleaning dock, and liftable brush. Nothing here is a blowout. Both are strong picks, and the right one depends on which handful of features you actually use.
Suction is the headline number: 30,000 Pa on the Flow 2 against 22,000 Pa on the Flow, a real gap on carpet and in pet-hair homes. But brush setup complicates it. The Flow uses a combo bristle-and-rubber main brush with two side brushes, so it sweeps corners and baseboards from both sides, where the Flow 2 runs a single rubber-and-bristle brush and one side brush. Mopping flips the script too: both use roller mops, and the Flow spins its roller at 110 RPM versus 80 RPM on the Flow 2. Dock automation clearly favors the Flow 2, which dispenses detergent when washing the mop and cleans its own base tray. Battery capacity also grows, 7,000 mAh versus 6,400 mAh.
The Flow 2's 30,000 Pa gives it the stronger pull, and its liftable main brush keeps the roller out of the way during mop passes. The Flow counters with a combo bristle-and-rubber main brush and two side brushes instead of one, which sweeps debris in from both edges and helps along baseboards.
Both use roller mops, the most effective mopping design available right now, and both rinse continuously rather than dragging a dirty pad. The Flow spins its roller at 110 RPM against 80 RPM on the Flow 2, and it lifts the mop 12 mm to clear carpet, so it scrubs faster on dried-on kitchen messes.
For homes with a heavy shedder, the Flow 2's 30,000 Pa has the advantage over the Flow's 22,000 Pa when pulling hair out of rug pile. Both use a rubber-and-bristle main brush design that resists tangling better than pure bristle.
Both pair LiDAR mapping with a camera and 3D structured light for obstacle avoidance, so they read a room the same way. The Flow adds an LED light to its obstacle system, which helps it identify socks and cables in dim rooms, and it stores maps for up to 4 floors.
This is the Flow 2's clearest win. Its dock adds detergent automatically when washing the mop roller, so the pads come out cleaner than a water-only wash, and the dock cleans its own tray. Both docks empty the dustbin on their own.
The Flow 2 carries a 7,000 mAh battery against 6,400 mAh in the Flow, a modest bump that helps on larger single-floor runs. The Flow still delivers up to 190 minutes per charge, which covers most homes in one pass.
It's a tie in practice. Both support voice control, no-go zones, multi-level maps, and smart obstacle avoidance, and the Flow 2 lists built-in voice plus Amazon Alexa, Google Assistant, and Apple compatibility.
| Feature | Narwal Flow | Narwal Flow 2 |
|---|---|---|
| Main Brush Type | Combo (bristle & rubber) | Single (rubber & bristle) |
| Auto Detergent Dispensing | No | Yes |
| Suction Power | 22,000 Pa | 30,000 Pa |
| Liftable Main Brush | No | Yes |
| Side Brush Count | 2 | 1 |
| Dock Self-Cleaning | No | Yes |
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Neither of these is a mistake. Go with the Flow 2 if suction and dock automation top your list and the higher price doesn't bother you. Take the original Flow if you mostly clean hard floors, want faster mop scrubbing and dual side brushes, and would rather keep the savings.
