Names such as Supremo and Excelso appear in descriptions of Colombian coffees. They are associated with trade and size classifications, not a universal sensory ranking that makes every bag bearing one name superior to another. The source's brief grading references are therefore a starting point for a question, not a complete purchasing verdict.
Read the seller's specification for the actual lot. Size, origin, preparation and any stated quality assessment describe different features. A large seed can still come from a coffee you do not prefer, while a less imposing grade name does not by itself determine a disappointing cup.
Use the classification alongside traceable lot details and a clear account of processing and roast. Then prepare the coffee with a measured recipe and assess what you enjoy. General trivia figures about caffeine, ages or percentages do not fill the gaps in a particular lot description. A good comparison uses like-for-like information rather than interpreting every impressive label as a promise about flavor.
The conversation
A good question can make a better brew.