"_____ of the Year" doesn't mean it has to be new. Just look at the car industry.
That said, I'd think that the Crossover gained points over the Etha based on being a new concept. Just-another-electronic-poppitt versus a pretty ground-breaking electro/mechanical offering is a pretty easy choice in my book. The Etha might be the "better" gun...but the Crossover is definitely the more imaginative.