Instead of getting several ecommerce themes, Marvel has 5 home varieties, 4 header styles for you to choose. On top of that, Marvel features a modern flat & minimal design with RTL languages support which will suit any B2C site.
Marketplace, as the name has implied, is a theme wholly dedicated for shopping only. It can serve well as a B2B, or B2C ecommerce website. It comes with a clean simple design with fully responsive layout, easy to use template, and conforming to Drupal standard.