Comment by ggasp

Pretty much the same thing that everyone else does: "Echo uses on-device keyword spotting to detect the wake word. When Echo detects the wake word, it lights up and streams audio to the cloud, where we leverage the power of Amazon Web Services to recognize and respond to your request." The article refers to the same thing being the difference that Samsung doesn't owns the Amazon/Microsoft/Google/IBM cloud where they run all the voice-recon algorithms.