Question: what is the difference between d4 and d6?
Answer: The D4 Connected has a smaller cleaning path (10.3 inches) compared to the D6 cleaning path (12 inches). The D6 has a higher quality filter than the D4 connected does. ... Neato's D4 has a smaller battery than the D6, as well. The D6 Connected has the ability to map multiple floors that the D4 Connected can't do.