Mine was Foro Vermouth and Darvelle Freres brandy, and added a dash of Fee Bros. Tobacco bitters.
Perhaps in a cocktail with only two ingredients, the individual ingredients matter moreso than with a cocktail with more ingredients. I mean; there isn't much to go on, so What You Mix Is What You Get. But then, perhaps some ingredients matter more than others. Vermouth (to me, of course) tastes QUITE different, depending on the brand. Brandy and Congac have less of a diversity of flavor, and Bourbon even less so.
The Darvell Freres is winding down, so I can rationalize a congnac for my next Brandy purchase. We'll see how that changes the game.