You will find that there are some distinct differences between Roomba 880 and 630 when comparing them.
Roomba 630 vs 880
images from manufacturer
Cleaning System
The cleaning system changes a lot.
The 880 now employs 2 Brushless Extractors versus 1 Bristle Brush + 1 Rubber Brush on the 630.
Brushless Design = less hair tangle, less maintenance
The 880 cleaning system also employs New Vacuum and Airflow Accelerator to delivers better suction to pick up more.
Filter
The 880 uses HEPA filter whereas the 630 uses standard filter.
Dirt Detect Technology
The 880 uses Dirt Detect Series 2 that employs both acoustic and optical sensors to find dirt whereas the 630 uses Dirt Detect Series 1 that employs only acoustic sensor to find dirt.
Room to Room Navigation
The 880 is compatible Lighthouse that helps room to room navigator whereas the 630 is not compatible with lighthouse.
Scheduling Feature
The 880 has on-board scheduling that you can use to schedule the unit to vacuum max 7 times a week whereas the 630 does NOT have the scheduling feature.
Full Bin Indicator
The 880 has a light to tell you when it is full whereas the 630 has no full bin indicator.
Persistent Pass Cleaning Method
The 880 employs a back-and-forth cleaning pattern to clean areas where it finds excessive dirt whereas the 630 does not have this Persistent Pass feature.
Battery
The 880 includes the Xlife Extended Life Battery to replace the APS battery on the 630, iRobot claim that the Xlife will doubles the time before you may need to replace the battery.
Home Base
The 880 comes with the new Integrated Home Base whereas the 630 comes with a Self-Charging Home Base and a Battery Charger.
Dimensions and Weight
The 630 measures 13.39 inches in diameter, 3.62 inches in height, weighs 7.9 pounds. The 880 measures 13.9 inches in diameter, 3.6 inches in height, weighs 8.4 pounds.
You can see that the 880 has a larger diameter and heavier weight.
Retail Price
The 880 retail price is much higher than the 630.
On irobot.com, the 880 is priced at $699.99 versus $349.99 on the 630.
Included Accessories
The 880 comes with 2 Virtual Wall Lighthouses with C batteries included whereas the 630 comes with 1 Auto Virtual Wall without C batteries.
The 880 comes with a Remote Control that lets you turn it on/off, steer it around, and remote access to Roomba commands, while the 630 does not come with this kit.
The 630 comes with 1 flat brush cleaning tool whereas the 880 does not include.
Both of them come with 1 Extra Filter.
Noise Level
The 880 noise level is slightly lower, but the difference is not significant.
If you know more difference between Roomba 630 and 880, please share your reviews below.