This video puts two 2k cameras side by side. Viofo takes the edge, with slightly sharper video and a super-capacitor. The Vantrue has slightly better color/exposure and less distortion.
The N2 is a dual lens setup made for viewing the road and passengers at the same time. If you’re looking for the type of camera to view in front of and behind the car you will either need two separate cameras or a unit that has a secondary camera on a wire and hangs from the rear window. This kind of camera is more for taxis or Uber drivers who need to keep an eye on their passengers.
The AutoVox D2 is a cheap dash cam built with low quality internal components. The result is a device that has poor video quality and low reliability. I reccommend looking at the A118-C (link above) as it is known for higher quality video and better reliability.
The Vantrue N1 has good quality video in a compact, solid package. It’s particularly adequate in daylight, with sharp detailed 1080p and accurate color. The audio is great too. Despite a few little usability issues, I would recommend this dash cam for those who are looking for a compact cam with good video.
The design of the R2 is really where Vantrue hit home. I particularly like the included power cable that has its own USB port, the suction mount design and the button layout. The video quality is good during the day and great at night. I wish that this camera was a little more covert when installed and that the video quality didn’t have that artifact ‘sparkle’ to it in the higher definition modes, but it’s hard to see the difference in video quality unless it is being directly compared to other cameras. It’s up to you to decide if it’s worth the extra $100 over the G1W series but if build quality is any indication of reliability I feel like the Vantrue will last longer than a g1w.