Compare any footage from drift, contour or Sony with a gopro and the GP leads
I have a drift and gopro, compared many times
However, convince is the drift
The latest drift has the same hardware as the gopro, the latest gopro uses the same image sensor as the sony, they're about the same camera with different package. Cannot say much about the sony though because I don't have one.
The Hero 2 is on par with the Drift HD, both have the same characteristics and good night/dark sensitivity. The hero 3 and Ghost plainly suck in low light.
Anyways I can't do a proper comparison because raw camera footage is not readily available, every comparison that is uploaded to YT is highly compressed. I don't even recognize my own footage after uploading to YT because the quality suffers so much.
Build quality? I don't know, I never saw any sony, contour or drift camera go flying down the street because a mount broke. I saw that many times with gopros.
The camera mount ecosystem of the gopros is stupid. Any other camera has a proprietary option and a standard mount and you can use the camera with or without the waterproof shell. Having a standard mount means that you can use the camera accessories you already own like tripods, suction cups, timelapse adapters, dollies, steadycams, etc. You cannot do that with a gopro while you surely can with drift, liq and most others.
I read not too long ago somebody posting a comparison of the gopro 3+ black and the Sony HDR-AS30 in a gopro forum. At first sight it looked like it was going to be a good discussion and then all the gopro fanboyism surfaced and they claimed advantages so ridiculous as gopro enabled biting the camera while surfing or that the live view remote was a stupid addition by sony and not needed for anything.
Picture-wise the cameras are the same. Some people like "protune" and all the gopro gimmick but you can do that with any camera in post with a few clicks.
I said last year that the action cameras aren't bringing anything new to the table. Well, Sony came with a truckload of stuff not found on other cameras and that makes the Sony a better option over the GP3+BE for the same price and even less.
Anybody choosing gopro over anything nowadays, fails to do the homework and is just following the majority. The same way with Sena.