Ubercart vs Drupal commerce for french ecommerce site
Check this article which compares Ubercart &amp; Commerce modules. Winner is commerce module for most advanced features and simplicity.

Commerce module is written from scratch to solve usability and other issues in Ubercart. Commerce module will be obvious choice for E-commerce portal.

As far as i know there is no out of the box module for Carte bleau payment gateway. But, if you know the module development you can write one and contribute to community using commerce payment gateway API. This will help you.

Best of luck :-)