No. 51 is primarily Brazilian St. Domingos Arabica, blended with Vietnamese Robusta for added punch and depth. Whereas Mocharagua is intense dark chocolate, No. 51 is a sweeter milk chocolate. It's a bit lighter and brighter, too, quite refreshing. Perfect both for fans of chocolatey coffees in general, and especially for anyone looking for one with more subtlety (ideal for serving to groups).