Answer:
The difference between a barbecue in the United States and a asado in Spanish-speaking countries is that in the American barbecue, the meat is freshly roasted on a charcoal grill.
As for asado from Spanish-speaking countries, the meat is cooked for a long time, an average of 4 hours on a gas stove.
In asado, the meat is chosen and cooked in higher cuts, on grills that can be tilted up to 30 degrees so that the fat drains into the collector.
A good asado is one that roasts the meat slowly to concentrate its necessary flavors, juices and tenderness.