here is what gopro fanboy says about sony...
the recording angle are small, due to the image cropping used for image stabilizing. (same thing like pspslim said, stablizer is useless)
the video looked soft (well, from all the cropping stabilizer algorithm, image tend to drop in quality)
here is what sony fanboy says about gopro...
their video look like you are sitting on the waasasasshhihihiing maccchhhinneeenneneeneee.... (i watched side by side comparison of bike ride video, it is DAMN obvious!... well, thats because its side by side comparison... if u watched it without comparison, u wouldn't know the differences, the feeling is like one person handheld a video cam vs one person using glidecam - floating feel)
thier color is so dulllllll and washed out, requires a lot Post processing. sony straight out can use.
but, if you have intention to use it at night.... let it be as for video camera purpose or riding.... sonyas200 will win a mile.
as for batterylife... its normal... building smaller and smaller, battery get small too. afaik, gopro has external battery pack direct connect to extent its life... i have not seen sony has it yet (correct me if im wrong)
i just share what i know... i might be wrong in some aspect point of view.
edit: sidenote: sony stabilizer can be off to gain back the full angle for recording.