Manual coffee roasters and automatic coffee roasters differ in the level of human intervention required to roast coffee beans.
Manual coffee roasters require more human intervention and are less expensive than automatic coffee roasters 1. They are designed to give you full control of the roasting process and are perfect for those who want to learn the science of roasting 2.
On the other hand, automatic coffee roasters are designed to automate the coffee roasting process and require minimal human intervention 1. They may a little more expensive than manual coffee roasters and are perfect for those who want to roast many coffee beans everyday.
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