Here are some difference between iClebo Arte and iRobot Roomba 880 robotic vacuum cleaners.
Roomba 880 vs iClebo Arte
images from manufacturer

Cleaning Pattern
The Roomba 880 cleans with a random approach whereas the iClebo Arte can clean with both systematic and random patterns.

Side Brush
The iClebo Arte has 2, left and right, side brushes whereas the Roomba 880 has 1 side brush for cleaning edges and corners.

Resume Cleaning
When the iClebo Arte is short of power, it go to charging base to recharge, once finishing recharging, it resumes cleaning where it left off. Whereas the Roomba 880 does not have this ability.

Mopping
The iClebo Arte can be equipped with microfiber cloth to mop hard floors whereas the Roomba 880 does not support mopping.

Beater
The iClebo uses 1 Bristle Brush whereas the Roomba 880 uses 2 Brushless rubber Extractors.
The brushless design on Roomba 880 makes it has less tangle problems and requires less maintenance.

Control Panel
The Roomba 880 uses Buttons whereas the iClebo Arte uses Touch Pad.

Barrier Kit
They have barriers to prevent them from entering restricted areas. However, the “Barrier” is different.
The Roomba 880 uses battery powered Virtual Wall whereas the iClebo uses Area Boundary Tape which is magnetic strip.

Handle
The Roomba 880 has a carrying handle on top for easy transport whereas the iClebo Arte has no handle.

Battery
The iClebo uses 2,200 mah Lithium ion battery whereas the Roomba 880 uses 3,000 mah Nickel Metal Hydride battery.

Battery Warranty
The iClebo battery carries 1 year warranty whereas the Roomba 880 battery carries 6 month warranty.

Price
The Roomba 880 is about $300 – $350 more expensive than the iClebo Arte.

Full Bin Indicator
The Roomba 880 has a full bin indicator whereas the iClebo does not feature.

Height & Diameter
The iClebo is slightly smaller.
The iClebo has a height of 3.5 inches and 13.78 inch diameter whereas the Roomba 880 is 3.6 inch tall, its diameter is 13.9 inch.

Weight
The iClebo is lighter, it weighs 6.1 pounds whereas the Roomba 880 weighs 8.4 pounds.

Similarities:
Both of them have charging base, remote control, scheduling feature, HEPA filter, sensors to avoid falling down stairs, etc.

According to user reviews, the iClebo navigates and deals with obstacles better than Roomba 880, whereas the performance of the Roomba 880 is better than the iClebo Arte.

You can download the manuals to learn more.
iRobot Roomba 880 Manual
http://www.irobot.com/For-the-Home/Support/Product-Resources/Roomba-800-Resources/Manuals-and-Resources.aspx
iClebo User Manual
http://iClebo.com/english/main_SUPPORT_manual.html

Please share your experience on Roomba 880 or iClebo Arte below to help others make a right purchasing decision.