IIRC - I'm at work, the game's at home - the game contains the Argentinian and Brazilian leagues, as well as some other South American teams in the "rest of the world" section. The Mexican league is also in it - not South America, I know, but they do send teams to Copa Libertadores.
Is there a verson for PS2? I didn't know there were any games with the Argentine or Mexican leagues. One day a game will come out with every league in the world. I hope I live to see it.
Yes...it's the World Tour Soccer game other people have been talking about. Same game, different name for the American market. Although I suppose they always could have called it This Isn't Football.
I haven't really played it enough yet to confidently compare the two. But I've certainly enjoyed it, and the career mode is very cool. Check out this thread for more information: https://www.bigsoccer.com/forum/showthread.php?s=&threadid=28964