Having been to both events...CABA World Series, Crystal Lake, in 2001 and the USA Baseball Junior Olympics in 2001 and 2002.
There is no comparison.
While the CABA event is well run and has 3 to 4 competitive teams, the fact that they have very few teams from California, Florida and Texas, says it all.
Any competitive baseball team should go to the USA Baseball Junior Olympics competitions (when we played they were held in Arizona and Florida) because of the "national" character of the teams; and, importantly, because they select the Junior Olympics National team from the attendees.