Origin is really shorthand for terroir, a word borrowed from wine. It means everything a place gives a coffee: the soil it stands in, how high up it sits, how much rain falls and when, how much shade it gets. And then the part people forget, which is the farming and processing traditions that have grown up in that place over generations. Some of what you taste is nature. Some of it is habit. Where coffee can grow at all is a separate question, and we cover that in What Is the Coffee Belt?
Why the same variety tastes different in different places
Genetics set a range. Place decides where inside that range the coffee lands.
Our Veracruz Gesha is a good example of both halves of that. It still tastes floral rather than nutty, because Gesha is Gesha and the variety is clearly doing work. But it will not taste the same as a Gesha from Panama or Ethiopia, because the soil and the light and the elevation are not the same. Even the right altitude is not a fixed number, because it depends how far the farm sits from the equator: farms nearer the equator sit higher, and farms further out sit lower1.
What the major regions taste like
Broad strokes here, and every generalisation about a whole continent has a thousand exceptions. But these are real patterns and they are worth knowing before you buy.
East Africa
Ethiopia and Kenya sit high, cool and volcanic. Ethiopia has the deepest genetic diversity of anywhere on earth, because coffee is native there, and the cups lean floral, citric and tea-like. Kenya is the most structurally intense coffee in the world. Blackcurrant, tomato, an acidity that arrives like somebody striking a note. If what you want is brightness and clarity, this is where you look.
Central America and Mexico
Volcanic soil again and high elevation again, but a gentler climate. What you get is balance instead of extremity. Chocolate and caramel through the middle, citrus acidity sitting on top, a rounder body than East Africa. This is where our Veracruz Gesha comes from.
South America
Two completely different stories under one heading. Colombia farms the Andes at altitude, on ground so steep it has to be picked by hand, and some regions get two harvests a year instead of one. Our Colombia comes out of Quindio in the coffee axis. Brazil is the opposite: enormous, comparatively low and flat, mostly mechanically harvested, and the biggest producer on the planet. Brazilian coffee is usually lower in acidity and heavier in body, nutty and chocolatey, which is exactly why it ends up as the backbone of so many espresso blends.
Asia and the Pacific
Indonesia, and Sumatra especially, is the clearest case of tradition beating terroir. The wet hulled method they use there exists because the climate is too humid to dry coffee the normal way. What comes out is unlike anywhere else: low acidity, heavy body, earthy and herbal and savoury. People tend to either love it or refuse it, and honestly both reactions are fair.
And what about the variety?
Variety is the other half of this. It is the plant itself rather than the place, and it narrows the range again: a Castillo and a Gesha grown on the same farm will not taste the same. We go through the ones worth knowing in Coffee Varieties 101.
So how much should you trust the origin on a label?
As a starting point, not a guarantee. Origin narrows the range. Variety narrows it further. Processing narrows it again. Then the roast and your brewing decide where inside all of that you actually land. Anyone telling you a country name predicts a flavor is overselling it. Anyone telling you origin does not matter has not put a Kenyan next to an Ethiopian.
Try this
Next time you are buying two bags, pick two from different continents that share the same processing method. Both washed is easiest. Then brew them identically on two mornings. Holding the process constant is the whole trick, because then whatever is different between the two cups is the place doing the work, and you will taste it far more clearly than you would comparing two random bags.