Coffee as a drink derives from coffee beans. Coffee experts like krema.com.au explain that the differences in flavour in coffee come from the different variants.
There are three basic types of coffee beans: Arabica, which composes approximately 60% of all coffee in the world; Robusta, of which makes up almost 40%; and Liberica, which makes up less than 1%.
There are other coffee variants, including beans that have no caffeine.
Arabica and Robusta
Different countries have their own variants of the Arabica and Robusta beans. This is due to the weather, climate and altitude. It also explains why some beans are more expensive than others. Arabica has more flavour and aroma, but lower caffeine content compared to Robusta.
It requires high altitudes for planting. The coffee plant produces fewer beans than Robusta. On the average, Robusta has twice the caffeine content of Arabica. It has a more acidic and harsher flavour than Arabica. It grows at lower altitudes and hotter climates in drier land than Arabica.
It is easier to plant and is less expensive, too. On the downside, Robusta has a less desirable flavour than Arabica. Robusta is a good blend coffee as it provides body to the beverage. People usually use it in mass-market coffee products like instant coffees, and low-end supermarket branded inexpensive brands.
Roast and Brew
You typically dry coffee beans first, then roasted, sorted and then packaged. Before serving to the customer, it is ground and brewed. There are different ways to roast and brew coffee, and these create differences in flavour between different cultivars.
You serve coffee as an espresso, Americano, cappuccino, macchiato, flat white, and other types of preparations. The basic brewed coffee can be with a French press, a coffee drip, a vacuum drip, and others, which require different kinds of brewing contraptions.
The different array of choices produces an almost unlimited number of variants, resulting in different flavours.
For regular folks, coffee starts their day. The first cup kick-starts the brain into waking up and the second serving is to remind a person that a full day is ahead of him.