Possible answer: "They both suck."
Not quite - if you suck on a vuvuzela you'll just get dizzy.
A while ago some nerds at NASA discovered that the deepest sound in the universe was being emitted by a black hole. It was a very, very, very low B flat. At this very moment, several French people are whinging about the noise of Vuvuzelas, and trying to get them banned. The note played by a vuvuzela? B Flat.
So beyond getting your atoms split into gazillions and sucked away instantly and very painfully, maybe another reason not to go near a black hole is that it might just annoy you to death instead.
In my opinion, the Vuvuzela is a great tool to use against Uruguayan actors crybabies soccer players, and we should blow them with pride.
Viva the Vuvuzela!