The difference, by the numbers
They have no ingredient in common: the Corpse Reviver #2 has gin, triple sec, Lillet Blanc, lemon juice and absinthe, the Naked and Famous mezcal, Yellow Chartreuse, Aperol and lime juice. In parts, a Corpse Reviver #2 is 1 gin, 1 triple sec, 1 Lillet and 1 lemon; a Naked and Famous is 1 mezcal, 1 Chartreuse, 1 Aperol and 1 lime. By volume, the Corpse Reviver #2 is 25% liqueur, 25% spirit, 25% citrus and 25% fortified wine and bitter; the Naked and Famous is 25% liqueur, 25% spirit, 25% citrus and 25% fortified wine and bitter. Different bottles, similar balance: that makes them close cousins on the ratio map.
They are about equally strong in the glass (14.9% and 14.7% ABV), but the Corpse Reviver #2 is the bigger drink, so it holds more alcohol (1.67 standard drinks against 1.22). The Corpse Reviver #2 has more calories (about 211 against 171), with about the same sugar (11.0 g and 11.9 g). Both are shaken and served in a coupe.