Scooba 390 vs Scooba 330
images from manufacturer

The Scooba 390 is the lastest Scooba model, it has some difference compared to previous versions.
The customer service of iRobot say that the tubing of the Scooba 390 does not get clogged as easily as previous models.

* Battery Life:
With the extended Life Power Management, the Scooba 390 is able to run longer than the Scooba 330.

* Convenience:
For added convenience, the parts of the 390 that need to be maintained or cleaned are in orange and grey.

* Area Coverage:
The Scooba 390 is for cleaning a larger area.
The Scooba 330 is able to clean 250 square ft whereas the Scooba 390 cleans up to 850 square ft per battery charge.
With a full tank, the 330 can clean 250 square ft whereas the 390 cleans up to 425 square feet.

* Noise Level:
The Scooba 330 is noisier than the 390.

* Moving Speed:
The Scooba 330 is moving slower than the Scooba 390.

* Color:
The color of the Scooba 390 looks like iron grey whereas the Scooba 330 is in blue.

Do you know more difference between Scooba 390 and 330? Please share below.