The 33-year-old, who played with the former Selecao striker at Real Madrid between 2002 and 2007, gave his thoughts on the two players in an exclusive interview with Goal.com and explained how the pair are very different forwards.
"You can't compare Ronaldo Nazario with Cristiano Ronaldo," he stressed.
"They are different. Ronaldo was a striker, a real killer. Cristiano is a broader type of forward and plays everywhere. He's more complete, but Ronnie was so special. Nowadays there are fewer No. 9s, but he was the best.