My guess is that the Dauphine Libre comes closest to the Tour of California. The tour of Calfironia is more important to big team however.

On Friday, May 25, 2012 7:08:16 AM UTC-7, Anton Berlin wrote:
Anyone ever seen an analysis of the top placings in the Giro vs the
ToC and then their performance in the TdF.?

It's easy to guess the Giro prepares more riders for higher placing
but to what degree.