Dyson V15 vs Roomba j9+ — Which Robot Actually Cleans?

The Contenders

### Dyson V15 Detect — $799 Dyson's first real robot vacuum. It's got the same laser dust detection as their stick vacuums, and it actually works.

Head to Head

### Suction Power Dyson wins. The V15 has 65 AW of suction vs the j9+'s estimated 40 AW. On carpet, you can see the difference.

### Navigation Tie. Both use LiDAR + camera-based navigation. Both map your home accurately. Both avoid obstacles well enough (Dyson's laser does help with hidden dust).

### Self-Emptying Roomba wins. The j9+ base holds 60 days of debris. Dyson's base is smaller and you need to empty it more often.

### Battery Life Roomba wins. The j9+ runs for 120 minutes vs the V15's 65 minutes. On a large home, the Dyson needs to recharge mid-clean.

### App Experience Dyson wins. The Dyson app is actually good — shows you a heat map of where it cleaned, dust levels by room, and lets you set no-go zones easily. The iRobot app works fine but feels dated.

The Verdict

If you have mostly hard floors: Dyson V15. The laser is genuinely useful and the suction is overkill. If you have carpet or a large home: Roomba j9+. Better battery and self-emptying base.

At $599 vs $799, the Roomba is the better value for most people.