Is there a difference between "magret of duck" and "fillet of duck"? In my local supermarket, they have 2 kinds of duck breast meat: something called magret and something called filet. If you'd ask me to recognize which is which based on just the meat itself, I wouldn't be able to tell the difference. There also doesn't seem to be much of a difference in price: both are a little under 21 EUR/kg, with magret being slightly cheaper.

Is there a difference between these 2 meats?
From  Wikipedia  magret refers to a specific breed (the Mulard, not to be confused with the Mallard):


  Magret refers specifically to the breast of a mulard or Barbary duck that has been force fed to produce foie gras.


From  dartagnan.com :


  Sometimes called “duck steak,” the magret (breast) of the Moulard duck is known for its rich flavor and dark red meat. Try it pan seared and find out why the French swear by the duck.