French Silk Pie and Chocolate Satin Pie are essentially the same thing by a different name. Both are typically made with a traditional pastry crust and a filling of chocolate mousse consisting of eggs, cream, chocolate, sugar, and butter. They don't use a thickener like cornstarch but instead are lightened either by a long period of beating or by folding in whipped cream. Chocolate cream pie, on the other hand, is more of a pudding pie made with a cooked custard or pudding filing that is thickened with cornstarch or sometimes flour.