Robinho told FourFourTwo magazine: "The Brazilian Ronaldo is phenomenal. Cristiano Ronaldo is a great player and deserves all the awards this year but he's not the phenomenal Ronaldo."
Robinho also had a stark warning for the Portuguese Ronaldo, who has spoken of his desire to engineer a move to Robinho's former club, Real Madrid.
Robinho said: "Madrid look after their own interests. If they want a player they will do anything they can. They did that with me. But then, the following year, they might have no interest in you at all."