After some test days with GoPro3 Black and Xiaomi Yi i find the best of that two action cams.
3 Dec 2015 (latest update with new Xiaomi)
Compleate Video File (1920x1080 24p 35Mbps-VBR, 606 MB) GoPro3 Black vs Xiaomi Yi (download here).
19 Oct. 2015
Compleate Video File (1920x1080 24p 35Mbps-VBR, 1.01 GB) is here ( GoPro3 vs. Xioami Yi ). After some tests i has realized that the Xiaomi Yi is not ok!
More information will coming soon.