I have had both – originally I had the Contour. I really liked the various mounts available for the contour. But the problem I had with the Contour was the aweful distortion in the video caused by the engine/interferance noise. The still video was exceptional, but once the motor started, the waves were too distracting. Higher the rpm, the more significant the wave distortion. I tried moutning it in several areas, but the results were the same. The GoPro does not have that issue and also puts out an exceptional video. I can go back on older video and know immediately which camera was used just by the distortions.
We may not be the fastest on the track...but we're having the most fun!