Brazil, who had beaten Argentina 2-1 in Goiania in September, won the trophy 4-3 in the shootout. The friendly double-header between the teams featured players only from domestic leagues.
The return leg was supposed to have taken place on October 3 but a floodlights failure at the original venue in the northern city of Resistencia forced a postponement until Wednesday.
Scocco, the Argentine first division's top scorer making his international debut at 27, put the home side ahead with a penalty in the 80th minute after Jean brought down Juan Manuel Martinez.
Brazil's Jean made amends four minutes later when he shot across the Argentine goal and Fred wrong-footed goalkeeper Agustin Orion to make it 1-1.
"We played an intelligent game, we were able to get the win which was what we were looking for, then the penalties are down to luck," Scocco said in a televised interview on the pitch.
"The players had a great game despite having to play a midweek fixture," coach Alejandro Sabella said.
The Argentine coach's squad had been involved in three league matches in the previous 10 days.
Brazil's Neymar had a lively first half, teasing the Argentine defence with his trademark, jinking runs and had a chance in the 33rd minute from inside the box but lifted his lob high over the bar.
Montillo, occupying the playmaker's role, went on a Lionel Messi-style diagonal run across the face of the goal and fed left-back Leonel Vangioni, whose cross was met by Barcos but his header went just wide.
