Nespresso divides its machines into its Vertuo line and an Original line. Vertuo coffee makers use centrifusion (rapid capsule spinning) to extract shots from barcode-enabled capsules and brew standard coffee up to 17 oz. However, the Original line includes a 19 bar pump to extract shots from capsules and are more expensive devices like the Lattissima, CitiZ, and Essenza. The main difference between Vertuo and Original Nespresso machines is the coffee quantities you'll be able to brew from them. The Vertuo line offers everything from 1.35oz to 18oz.
In contrast, Originals are devised to offer more petite but stronger brews of between 0.85oz and 5oz. You'll also require various pods for these machines. However, both are constructed from recyclable aluminum and offer a huge range of mixtures and strengths.