For those asking about the Unicorn Beetle case, I have one for my Nexus 6. It's a great case and if I had to compare to an Defender from Otterbox, then I would have to say that they're equal, to me at least. They do apply differently than an Otterbox, though.
As for protection, it works well for what I used it for. My use was for when I went biking and it did see some drops from time-to-time. The holsters is pretty beefy, too. Since there will be no Defender made for the EDGE, then I'll most likely be picking up one of the Unicorn Beetles.