I once pulled up to a bunch of sport bikes parked at an ice cream store on my BMW touring motorcycle I used to own. All these kids with their carbon fiber laden bikes were looking with that "Check this old dude" look on their face. As I took off my helmet I said "Wanna race?" to which they started laughing and I added "To Maine?" to which they all gathered around to admire the Beemer and it's different purpose. The bottom line is there are different boats for different things. A Sunfish or Lasers are quite capable boats but who wants to be out on that when it's not nice?
I like both of these boats, but if I had to take one with no knowledge of the conditions or water, I'd take the CS15 every time. But I can definitely see the appeal of the Goat.