Interesting. I have both, in several of the same rooms, and I find that I use Sonos all the time and almost never use Alexa. But I think I'm the oddball in the world, because I find voice control (I have both Alexa and Siri in my life) to be annoying and clumsy most of the time. I'd rather just tap or type. And the sound quality on Sonos is so much better that aside from voice control, Alexa seems to have no advantage. But again, I know I'm the weird one here - everyone else seems to love voice control.

Funny, I have both and I consider them different products with very different use-cases (although I have the Echo Dots, not the full size Echos).

Also, in a great development, both are going to integrate with each other much better soon; there's a private beta in place right now: http://www.aftvnews.com/sonos-begins-beta-testing-amazon-ale...