Latest 4K wearable camera from Sony against established genre leader GoPro Hero 4. Both used 60Mbps recording bandwidth. It seems Sony has more resolution, vivid color from Vivid mode, better operability through live-view handy remote. GoPro had longer battery life in my usage. The biggest disadvantage of GoPro is that you always need housing to attach camera to mount or bracket, which means you have extra 1 glass all the time.