Navibot vs Roomba 780
images from manufacturer

Appearance:
Maybe most people don’t care how cool the robotic vacuum looks, they only care what it can do and how well it does. However, if you are one of the few people who wants a better looking robot, then the Navibot wins, it looks more pretty than the Roomba.

Getting stuck?
The Navibot is more likely to get stuck on things and require rescue, the Roomba acts greater at untangling itself from things
like power cord.

Suction:
Suction of the Navibot is a bit poorer.

Battery Life:
Based on users’ reviews, the battery life of the Navibot seems not as long as the Roomba.

Noise Level:
Users say that the Navibot is quieter than the Roomba.

Clean Up:
Navibot is easier to clean up after use.

Efficiency:
Samsung Navibot is more efficient for cleaning empty areas. But for complex spaces, the Roomba beats the Navibot because of
its random cleaning algorithm. The Roomba miss less spots than the Navibot, but it takes more time to vacuum the same areas.

Side Brush:
The Roomba has 1 side brush while the Navibot comes with 2. However, it does not mean that the Navibot clean edges better than
the Roomba.

Price:
The Navibot is cheaper than the latest Roomba 700 series.

Similarities:
have scheduling option;
both clean area rugs and hardwood floors well;
both can pick up pet hair;
automatically self-adjust from carpets and hard floors;
automatically return to recharge;
feature cliff sensor;
including guiding devices, the Roomba supports virtual wall lighthouses, the Navibot comes with Virtual Guards;
including remote control.

Please reply below if you know more difference between Samsung Navibot and iRobot Roomba.