13% pricier ≈ US$1,550
- Runtime 180 min vs 60 min
- Noise level 74 dB vs 80 dB
- Base station Charging dock vs Auto-empty dock
3 vacuum-only robots at a similar price that compete with the Kobold VR7 RB7 Servicestation — what each does better, what it gives up and how the price compares.