Espresso is a thick, concentrated form of coffee that you can serve alone or use as a building block for other crafted coffee drinks.
It may be easiest to think of a Lungo as a “long” espresso, meaning it takes twice as long to pull the shot.
The Espresso tastes strong, bold and acidic while the Lungo tastes smooth, light and fruity.
A Lungo has slightly more caffeine than espresso since double the water needs to flow through the coffee grounds. More water means more extraction and, thus, more caffeine.
A Lungo is noticeably larger from the get-go. With an espresso shot being 1 oz, a Lungo easily doubles that amount of liquid.