I see a few questions about whether the sonos outdoor speaker is better than the Sonance Mariner series. I had the same questions as the speakers look pretty much identical.
I called Sonance technical support about this. I was told the sonos product is a “lower end” product. The woofer, for example, uses lower quality items than the Sonance equivalent (I can’t remember exactly what was said, but the construction of the woofer uses a lower quality material, among other technical differences).
I ended up going with the mariner 86 as it was pretty close to the same money for a much higher end speaker (albeit a bit bigger).