The source discusses a deep-roasted blend of Brazilian and Indonesian coffees through a charcoal-style flavour description. That wording may describe the intended sensory style, and should not automatically be taken as evidence of a particular roasting fuel or an added ingredient. The source uses Minas Gerais in Brazil and Sumatra in Indonesia to explain the blend's component choices, while its described target is a substantial roasted profile.
Ask how the roaster identifies the blend and its intended use. A fuller roast can foreground roasted or cocoa-associated impressions, while the component coffees and preparation still matter. Strong colour and a heavy taste are not, by themselves, a complete assessment of balance or quality.
Try the coffee in the format you normally enjoy, including milk if appropriate, and measure the dose and beverage quantity. Compare sweetness, bitterness and finish rather than judging only intensity. A transparent blend description lets the buyer understand the product without treating national-origin stereotypes or a dramatic roast name as a substitute for the actual cup.
The conversation
A good question can make a better brew.