What makes the Roomba j7 series different from other robot vacuums?

Regarding the Roomba: The j7 series uses a front-facing camera and PrecisionVision object avoidance to identify and avoid shoes, dog toys, charging cables, and even pet vomit — things most vacuums just eat. Avoiding pet vomit is the real test because a vacuum that eats it spreads the mess across the entire floor. If you have pets, the j7 series is the baseline, not the upgrade.