It all depends on what type of filming you are going to be doing if you are doing like 80/20 POV/follow cam then i would say get the GoPro because it is a wide angle lense when the contour is not. I have the GoPro an i love i had a problem with one of my mounts i contacted them and they sent me 2 new ones. GoPro is my favorite company to do business with. they take care of their customers.
my vote is for the GoPro