He explained to tribalfootball.com: "I would say that I prefer Boschilla slightly ahead of Nathan because his incredible speed would be a danger to all defences.
"His left-foot is regarded the best at Sao Paulo and he recently signed a new contract to 2015 - so I do not expect Sao Paulo to give him up cheaply. Boschilia has fantastic speed and technique, he has everything to succeed in Europe. He only needs to build himself up physically."
On Nathan, Giuliani says he is just as talented.
"I'd compare him with Oscar at Chelsea. A great dribbler, he is certainly a prospect for the future.
"But Boshilla looks more ready for a big European club at this moment."
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