On Pes4, and in real life, Brazil have more quality in the attacking areas.
But the big difference is that on PES4 defence hardly matters when playing against the computer as you should be able to whoop it's arse easily even in 6 star, and individual ability of your defenders doesn't matter anywhere near as much as that of your attackers no matter who you play.
But in real life the individual ability of your defenders matters a lot. And i nthis respect france have more balance accross the whole squad than brazil.
Argentina tore Brazil apart in the recent game they had with them. And any team with quality attacking players could probably do the same. Brazil in real life are lop sided, and must rely on their attack to win them games, because if they don't click, they can hardly rely on their defence to pull them through.