Question: what is the difference between the 2nd gen and 3rd gen echo dot?
Answer: Sound. This is the single biggest difference between the two devices, as the third generation sounds significantly better than the second generation. The new 3rd-gen Echo Dot has a single 1.6-inch speaker sending out 360-degree sound. ... The new Dot still retains the 3.5 mm port for connecting to an external speaker.