Some points:
i find the countour lens not as good as the GoPro(its very distorted around the edges)
you can mount the GoPro ANYWHERE! whilst the contour is limited to your goggles
The contour has laser sighting, but it cannot be adjusted as well as the goPro (so why would you need sighting if you cannot adjust properly?
And i find the countour's footage very shakey while the GoPro seems to handle quite well...