Same volume, sure. And a Ford Escape and a Aston Martin likely occupy the same volume of space too...
What's the point of the LCD screen again? The contour has one switch. Slide on and it turns the camera on and starts recording, slide it back and it's off.
Remember the Contour Roam is waterproof WITHOUT the housing. It's only a small waterproof rating but I have used it for snorkelling, kayaking, and of course all weather snowboarding WITHOUT a case... Have you taken your Go Pro deeper than 10' down in the water?
There's form and function. Ideally you'd want the best of both worlds in one product. The GoPro CLEARLY is the underdog in the form category vs. all other helmet cam options I've seen. As you mentioned above function is similar. So what you're essentially saying is that you'd rather buy an ugly product that works the same? I'm not sure I get it.
I certainly put a lot of weight into the function side of my purchase decisions, but to suggest that it makes me somehow "not cool" to also consider form, I just don't understand.