Other than your caster adjustment, the Losi has many adjustments. For most, the Losi works out of the box without tinkering.
Kyosho is a company that never sold itself on the RTR market. They have been aimed at the racers for a bit longer than most. However, there is nothing on that car that makes it any more special than any other.
Cody was comfortable with his car and was at the right place to win it. Much like Hara is 2008. Had Cody been driving something different.... Well we can't speculate on that as it never happend.
Are you saying that if you drove a Kyosho you would have won the worlds ?