People recognize GoPro cameras for what they are. They are easily understood as a camera. Glasshole devices are not as easily recognizable and people honestly may not realize they are being recorded especially when the glasshole does not inform everyone they are being recorded.

Now, for your "while cycling" qualifier, why does it matter? Again, if you stop to talk to people while recording and it is not obvious you are recording, you're a glasshole. Personally, I have no experience with camera quality from the devices, but I do know what a GoPro can do. My gut instinct is that the GoPro will be superior footage.

It's a big obvious doofus camera vs a tiny spy camera, pretty simple!