What's the Difference Between the DEEBOT 710, DEEBOT 711 and DEEBOT 711S?

The 710 is white, the 711 is black.   Mechanically there is nothing different - just the color.    They have the same motors, features, dimensions, etc.

The 711S is identical to the 711 - but it has a slightly larger battery, giving it a 20% longer runtime.