Android Wear
Android wear UI is not customizablePairs with Android phone via Bluetooth (requires Android 4.3+)1 day battery lifeNotifications appear on watchSwipe left to dismissSwipe right to take further action (e.g. open in phone)Reply with voice (only for certain apps)Requires 2 handsAvailability (in certain locations):Currently available: Samsung Galaxy Gear Live / LG G watchMoto 360 available in the summer of 2014Samsung Gear live (vs the G Watch)smaller screen (1.63″ Super AMOLED vs 1.65” IPS LCD)higher resolution (320×320 vs 280×280)smaller battery (300 mAh vs 400mAh)extra Heart Rate Sensor (common sensors: Compass, Accelerometer, Gyroscope)has a Bluetooth / Wi-Fi antennacheaper in US (US$199 vs US$229) (Australia: $1 more expensive, AUD$250 vs AUD$249)LG G watchpossible charging contact corrosion should be fixedcan charge while wearing (using the cradle), not ideal but possible