Italian aperitivo and digestivo are distinct categories of spirits, with fairly specific uses and characteristics, from colors and flavors to alcoholic strength. Bear in mind that language is slippery and there can be drinks that are considered aperitivi and digestive that don’t necessarily fall into either category.
For instance, a Pilsner can serve as a pre-dinner drink, but that doesn’t make it an aperitivo liqueur. Similarly, Calvados and grappa are often consumed after meals as a supposed digestive aid, but they are not considered digestivo liqueurs.
