With the release of the Sonos One (Gen2) you may have questions as to how it compares to the Sonos One (Gen1) and its not so distant cousin the Sonos Play:1. Rest assured that all three speakers are top notch in terms of build quality, internal components, attention to detail and deliver the outstanding audio experience you expect from a Sonos speaker. In a blind listening test you'd be hard pressed to choose one over the other (if at all).
Update 2019: In addition to Amazon Alexa, Google Voice is also available as a programmable single choice voice assistant on the Sonos One (Gen 1&2).
Please use the chart below as a reference tool for your buying decision: