Grilling is a high-heat, fast-cooking method over direct flame between 200°C to 315°C, ideal for steaks, burgers, seafood, and vegetables, producing a seared, juicy exterior in minutes.
Barbecue, in contrast, uses low-and-slow indirect heat, often with smoke around 95°C to 135°C, to tenderize larger or tougher cuts like brisket, ribs, and pork shoulder, infusing deep flavor over hours.
Simply put, grilling is about speed and sear, while barbecue is about patience, tenderness, and smoky richness.