ive never used chin mount.. ive only used mirror replacement mounts.. the stick on mounts and a chest rig...
ive shot with a gopro original hero, a gopro 2 and a gopro4 black..
they all look damn similar. from 720p on the first GP to 1080 with the newest last year ... the newer ones have more features to make scrolling through menus easier. or a back LCD screen. but it kills the battery faster...
my original hero is or the GP2 is my go to as I can charge it and run it every session 20 mins at a time all day... but the hero4 I have to charge at lunch. and the vid seems very close