I haven't used Android Wear yet but from everything I've read, both Watch OS and Android Wear seem to offer pretty much the same functionality on their respective platforms, including their own gimmicks (heartbeats, drawing, emoji GIF on the Apple Watch, drawing emoji on Android Wear). I am intrigued by the remote wifi functionality offered by Android Wear in the latest version of the OS and may eventually pick up a Wear watch to test that out specifically.
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This feature has been surprisingly useful for me on a few occasions. I was able to speak to my wife while out with the dogs at a dog park (not an ideal location to be handling my phone
), again while walking the dogs and also around the house a few times because I don't need to carry my phone with me while wearing the watch. Callers have said they can hear me just fine and in none of those situations did I need to hold my wrist up to my face.
I won't use it out in busier public locations but it has certainly been useful.