I'm sorry, I'm not very familiar with the specific 'Corazon Salvaje' from 1993 in great detail. It might be a telenovela or a story. Generally, it could be about love, passion, and the human heart's wildness (as 'corazon salvaje' means 'wild heart' in Spanish).
The 'amigo brothers' story is about two best friends who are also boxers. They have to face each other in a boxing match. Despite their friendship, they are both determined to win. In the end, they show great sportsmanship and their friendship remains intact.
The main plot is about two friends, Antonio and Felix, who are also boxers. They are very close like brothers but have to face each other in a boxing match. It shows their struggle between friendship and competition.
The main theme is friendship. The two amigo brothers, Antonio and Felix, are such good friends that they do almost everything together. But when they are about to fight in a boxing match, things get complicated. Their friendship is challenged because they both want to win the match. But throughout the story, we see that their friendship is strong enough to survive this tough situation. They don't let the competition destroy their bond, and this shows that friendship is the central theme.