The European eliminations favor the stronger teams by grouping one or two powerhouses against two or more weaker teams. Therefore, most of the stronger teams make it to world cup. The South American eliminations is everyone against everyone, twice. There are 10 nations and 18 games. The first four make it straight to the world cup. There are no groups that favor the stronger nations. In other words, you better be ready with a good plan and good coaching. For example, Argentina is the third ranked team in the world and in 5th place right now.
People say playing against Colombia, Ecuador and/or Bolivia is easy. Has any European team played in the heat of 105 degrees F in Barranquilla? Or what about the altitude in Quito or La Paz? La Paz has an altitude of 3,000+ meters! Most players not used to it, get altitude sickness.
Playing against Uruguay and Paraguay in Montevideo or Asunción takes its toll. These midfielders are tough when they play for their national teams. You are lucky to get out of there alive!
Argentina and Brazil are the best of friends, but not on the football pitch. Every game is worse than Real vs Barça. If we make it through the eliminations or the test of fire, we are in good shape for the world cup.