I am not dismissing top clubs in Argentina and even less Brazil, it's always hard to play against Flamengo, Palmeiras, Atletico Mineiro, River, Boca, even if I didn't liked what I saw at Boca recently, they looked better under Ibarra, but compared with the Boca teams under Bianchi it's hard to say is vintage Boca.
Would say River is more advanced at this stage because Gallardo was there many years, and Boca had some weak coaches, still better wait to see if Ibarra will be better for them.
But it will be hard for Boca or even River when basically Flamengo alone can spend more in players even than Palmeiras, Corinthians, let alone River or Boca, next time someone from Benfica tries to sign a Enzo ask for 40 million euros instead 20, until they give up.