Having a dead Ciao to study, here's what I've found:
Although they have the same basic engine, the Ciao has a different number muffler on it. the carburetor is a 10MM with a 43 main jet.
The Grande has the 30MPH muffler, 12MM carb with an air filter that has a disc in it with 6 holes as opposed to the Ciao's 3.
The Ciao I have has turn indicators, but is not the super Deluxe with a variator.
Jim