Nice goal
You know what's interesting? Brazil and Argentina have met 96 times, 36 wins for each and 24 draws. Roughly 150 goals scored by each. So it's fair to say OVERALL they're pretty equal teams.
But it's important to mention that most Argentina wins were in the 20's, 30's and 40's. While Brasil won most confronts in the 60's, 70's, 80's and from 1990' to today they won 15 of those 30 matches. Argentina won 10 and they drew 5.
So Brazil have the upper hand when it comes to most important titles and having better teams and results in the last 25 years.