But the joke here is also commenting on the vibe of an espresso martini in relation to a vodka redbull. The latter is seen as a bit more of a trashy drink while the former has a fancier vibe. I love an Irish coffee, but the metaphor would change to something like the Irish coffee being a vodka redbull that travelled europe during the winter.

JD and coke has same sorta of vibe as the vodka redbull, but coke has a lot less caffeine.

Not heard of Nutty Spaniards, googled 3 recipes and none had any caffeine mixer I could see. Red wine, sherry, almond mixer and orange bitters.