Heirloom is widely used on Ethiopian coffee labels, but it should not be read as the name of one uniform variety. The source examines how the term can group together coffees with different genetic identities and local histories. It communicates a broad story while leaving important questions unanswered.
Look for more specific information where it is available: a local variety name, a producer, a station or a clearly described lot. None of those details alone guarantees flavour, but together they make comparisons more meaningful. A processing label and roast description also belong in the picture.
Taste the coffee before deciding whether its label explains everything you notice. Two heirloom-labelled coffees may behave differently in the brewer and present different sensory impressions. Record the full product information with your recipe so a later comparison refers to the actual lot. Enjoying the coffee does not require pretending the broadest term on the bag is a complete botanical identification.
The conversation
A good question can make a better brew.