I want to buy gopro camera, I see there is big diference in price e.g.
http://www.gopro.hr/kamere/p/GoPro-Hero/ProductID/9426 cost $200
http://www.gopro.hr/kamere/p/GoPro-Hero4-Black/ProductID/19131 cost $600
big diference in cost, what is diference in quality of video, photo and options ?