The Jabulani was made by German firm adidas and used in the
Bundesliga since February.
After watching Joachim Low's side beat Australia 4-0, Carra
claimed the experience gives them an edge.
The Premier League has a contract with Nike and Carra said: "It
gives them an advantage, that's obvious. The ball is so
inconsistent you don't know what it's going to do.
"It makes it difficult which is the same for every team except
Germany."
But he thought Low's side were superb, especially hitman Ozil
Mesut.
He said: "It was impressive. I thought Ozil was
outstanding."
