- These machines boil water to produce steam. The steam's pressure forces it through the coffee, producing the drink that runs into the cups beneath the machine's outlets.
- These machines heat water to the optimum temperature required to produce a cup of coffee. The pump then forces water through the ground coffee and the drink runs into the cups beneath the outlets.
- Steam espresso makers are less expensive. The coffee is hotter than it is in pump machines.
- High temperatures can give the coffee a burned taste. The website Coffee Makers Cafe says steam machines cannot produce a quality crema on espresso and cannot be opened when in use because of the danger of boiling water.
- Coffee Makers Cafe says the coffee from these machines generally has a "nicer taste" than steam machine coffee. It also has a "high-quality crema."
- Pump machines are generally more expensive than steam machines.




