Is prosecco sweet?

I'd say it is. Repetition is something (an idea, a word, a phrase etc. etc.) which is REPEATED for effect. Here, the word 'sweet' is repeated. It is done for effect. Hank Williams in one of his songs...

Sweet Tarts are a little bit of both. It tastes more sour but it is really equal.

Candyman, from Clive Barker's story 'Candyman,' said and wrote in graffiti, "Sweets For The Sweet." Hamlet said, "Sweets to the sweet, farewell!"

yeah they are!

Sweet potatoes are not actually sweet. They are called sweet potatoes because they are not bland, and people back in the day had never tasted such a good potato before. Because they considered candy...