It's crazy to say that Cristiano hasn't had the better career - he blatantly has. There are other factors to this though - and Ronaldo's injuries/decline (post the World Cup - after that he became a bit more overweight etc) weren't through a lack of physical discipline that is oft levelled at the likes of Ronaldinho/Adriano etc - he had two freak injuries one after the other, both very much career threatening. Additionally, Ronaldo obviously made some bad career choices (e.g. the move to Inter etc).
But everyone who saw Ronaldo at his absolutely peak knows what an absolute monster of a player he was.
Would he have kept it up? Was that merely his trajectory (as he developed as a player) or as that always going to be his peak regardless of the injuries etc? We'll never know for sure, and that adds a bit of nostalgic romanticism to his greatness, that I will grant you.
Another thing we will never know is how much (if at all) the 98 World Cup did affect Ronaldo - Physically? Emotionally? Mentally?
What is for sure though is:
- By the time the 98 World Cup came around, and certainly following his last PSV season, a season at Barcelona, and a couple of Inter seasons in, by his late teens/early 20s, he was being talked about as possibly the greatest player ever. Don't make me laugh with Mbappe comparisons - a fantastic player in his own right, but Ronaldo had more talent in his pinky etc. The closest I have seen to this is Messi, but even he wasn't quite being talked about in those terms at that age, but certainly as a possible contender for the throne. (Caveat: there's no doubting that Cristiano, while extremely talented, was nowhere near in any kind of best player in the world discussions in his late teens/early 20s, merely a potential thing - which as you can imagine is very much a credit to what he became as an athlete and as a footballer). Anyone bringing up statistics of how Ronaldo didn't score a goal a game or had a greater number of goals than games played (like Messi/Ronaldo have to an extent) is an absolute fool who knows nothing about football. He was nearing a goal a game at PSV and Barcelona and then he moved to the most difficult league in the world for strikers and had a great season before the World Cup and then a half season before injury struck. Anyone bringing up trophies is also an absolute fool. In case you haven't realised, football IS a team sport.
- Before his injuries, he definitely grew as a football player. At PSV/Barcelona, he was very much a Mbappe-style player, except just better in every possible way. By the time he'd moved to Inter, he became a playmaker too to an extent (not quite what Messi is, but certainly more than most strikers are). So he was definitely capable of a better trajectory, not an Owen-style young prodigy (who was bloody good at what he did) but faded away once the pace went.
- Despite the two possible career threatening injuries, Ronaldo came back, won a World Cup, and for the next 3-4 seasons was one of the top 5 strikers in the world along with Henry, Shevchenko etc. Now if you only started following football around this period, this sounds absolutely crazy, but to get a better understanding of the amount of talent Ronaldo had, I'd say that the striker that came back and became 'only' one of the top 5 strikers in the world (along with someone as ridiculously good as Henry) was barely operating at 10% of what he was actually capable of.
- If he wins World Cup 98 (where he was the best player and top scorer before the final), he cements his legacy there and then, at the age of 21.
What is also for sure regarding Cristiano is that (and I don't think there can be any dispute about this) he's the greatest athlete football has ever seen.