What's the fuss and what's the difference?
According to the experts, but in layman's terms, one is a like a mall with cars (shared zone) the other like a street with pedestrians (shared street). The speed limit for shared street is 25kph and for a shared zone is 10kph. In the mix as well is often bicycles that can travel in either diection, often even in a one way street. Nevertheless, we are likley to see more of these types of zones in the future.