Whisky lovers agree that quality matters when sipping a dram neat or on the rocks—but what about when you’re making a cocktail? Should you spend big bucks on a mature or special bottle, or will an inexpensive option serve just as well? Whisky Advocate’s editors decided to answer that question in the most indisputable way: by trying two identical Old Fashioneds—one made with a $15 bourbon and the other with a $150 bourbon—tasted blind.