Ronaldo won the World Cup (man of the match with both goals), was awarded the Ballon D'or, the Onze D'or, World Soccer Magazine World Player of the Year, and the FIFA World Player of the Year the season he signed for Madrid. He also scored 83 goals in 127 appearances for Madrid. It's fair to say he was still pretty good when he played with Zidane.
Hallucinogen is still right. Ronaldo wasn't the same player after his injuries around 2000. I mean it was SO visible to the eye how his accelaration and the way he dribbled the ball changed. As a player he went from "Messi level" to "Henry level", if you like. From all time great to great. The international stage has only seen the real Ronaldo in 98. Ironically when something still unknown happened to him in that final and Brazil basically played with 10 men to lose to Zidane's France.