Wanted to share my review of an awesome action cam that I recently found that seems to be a "GoPro Killer". I have my full review below, but here are some of the pros of each camera for anyone who is interested in driving action shots, or anyone who just likes shooting car videos.
Yi 4k
1. Built in mounting Thread
2. Better image stabilization for driving
3. PRICE
4. Easy to use touchscreen
5. Video Quality
GoPro 5
1. Audio quality is a bit better
2. Voice control
3. Brand name/ability to take it in to a retail store