As I understand it, a standard espresso shot is about 40 mL in volume, and a lungo/allongé is 100 mL or more. They start with the same amount of ground coffee, but the lungo is made by putting more water through the grounds. (This is assuming a standard portafilter machine.)
So... if I have two Nespresso capsules in front of me, and one says "espresso" and the other says "lungo," shouldn't they have the same amount of coffee inside? Is there an actual difference between them?
The two kinds of capsule weigh the same (6g), so it appears that there is no actual difference between them, unless there's something I'm not thinking of...