No, he wouldn't He was playing for Inter when the likes of Bierhoff were outscoring him. On his entire career, he won a single time Golden Shoe. During his years the players who won it were: Machlas, Jardel (twice), Maakay, Larsoon, Kevin Philips and Henry (Luca Toni, Francesco Totti etc were later but he was finished by that stage).
Can anyone imagine Ronaldo and Messi getting outscored from Kevin Philips, Jardel or Bierhoff?
Also, him winning a single league title (and no UCL) in 10+ years playing for some dominant teams like PSV, Barca, Inter, Real Madrid (3 times winner of UCL in the 5 years before he joined them) and Milano is incredibly a poor record.
Ronaldo was a great player in international stage, but on club level he was the best player in Europe in a single season of his career.
1. Before his horrible knee injuries, R9 was exceptional, the best in the world by a country mile.
R9 adapted to the Italian style of the game in his first season. He had his best season ever in 97-98 at Inter, despite the fact that that Inter team was filled mostly with average players. He became a complete striker, and was involved in almost all of Inter's offensive play. He was dribbling and scoring on his own, assisting his teammates, he was the first-choice penalty taker, and he was taking and scoring freekicks.
Despite the fact that Bierhoff scored 3 more goals that season (28 to R9's 25), R9 was the superior player by far and was named Serie A Footballer of the Year. Plus he won the Ballon D'Or and the FIFA Footballer of the Year award. Bierhoff wasn't even the second best striker in the league, Batistuta and Del Piero were far superior as well.
2. The fact that you said he got beat to the Golden Shoe by the likes of Machlas, Jardel, Larsoon and Philips shows you have no clue about football.
In case you didn't knew, in the years those guys won it, R9 was injured for most of the time, so it's only logic that if you don't play you cannot score, therefore you can't win it. He missed the entire 2000-2001 season and much of the two seasons either side of it.
3. Now regarding him not winning the CL, again your comment shows that you have no clue about football. Some of the clubs R9 played for in the time span you mentioned never even got to play in the CL.
A) While he was with PSV, R9 never got the chance to compete in the CL. Only the league champions were eligible to do that.
PSV finished 3rd in the 1994-1995 season and 2nd in 1995-1996. Ronaldo was the top scorer in the league (with 30 goals) in his first season. His second season was marked by a knee injury which kept him out of most of the campaign, but he still averaged nearly a goal a game, (19 goals in 21 appearances). During his two seasons at PSV, Ronaldo scored 54 goals in 57 games.
B) R9 scored 47 goals in 49 games with Barcelona, but the team didn't play in the CL that year, so he never got the chance to compete for the trophy.
C) R9's first chance to win the CL came in his second season at Inter, but they got eliminated by Man United in the quarter final stages. As we all know, our team won the CL that year. It was a 2 leg match, and R9 only played in the game at San Siro.
D) When R9 came to Real, he was passed his prime. Still among the best in the world, by nowhere near the player he used to be before his knee injuries.
So were most of his teammates. That team was good offense-wise, but they lacked a proper defense, their biggest mistake coming from the fact they sold Makelele.
E) With Milan, he was already way past his best.
So to sum it up R9 had just 1 attempt to win the CL while he was in his prime, and he didn't play in the game Inter lost at Old Trafford, so there's no way to blame him for that loss. He had 4 attempts to win the CL after his prime (with Real).
By comparison, since he became a starting XI player for Barcelona, Messi has only won it 3 times in 14 years, and by playing with vastly superior teammates. Since Xavi and Iniesta left, Messi has failed to win a single CL.
As the poster you quoted mentioned,prime R9 would have no problem whatsoever in putting up the same numbers as Messi and CR7 or even exceeding them, were he to play in the star packed teams they've played in.