Which Roomba has better object avoidance — the j7+ or the s9+?

The j7+ has the best object avoidance in the lineup because its camera identifies cords, socks, and dog poop and navigates around each one. The s9+ has a less capable system and can get tangled in the same things the j7+ dodges. If you’re buying a Roomba specifically to avoid pet waste and cables, the j7+ is the right pick.