SOE coffee beans are espresso coffee made from single origin or single variety of coffee beans, which can better highlight the unique flavor of coffee origin and give coffee a richer sense of hierarchy. After adding water or different proportions of milk, SOE coffee can also better show the unique flavor of a producing area.
The stability of SOE coffee beans is relatively poor, because coffee beans are agricultural products, and their flavor is affected by various natural factors every year. Even coffee beans from the same origin will have different flavors. In addition, if the roasting degree is too shallow, the extracted SOE coffee is easy to be sour and dilute.
Furthermore, most espresso products in coffee shops use deep roasted espresso beans, because they have longer stability and better taste. Therefore, in most cases, SOE coffee beans are not necessarily cheaper than hand-brewed coffee beans.
I hope the above contents are helpful to you. You can consult a barista, or consult forums and websites about SOE coffee and hand-brewed coffee for more information.