The trumpet and cornet are brass instruments that have a lot of similarities, but there are some key differences that set them apart. The main difference between a trumpet and a cornet is in the shape of their bells. A trumpet has a conical bell shape while a cornet has a more rounded, cup-shaped bell. This gives the cornet a mellower, more mellifluous sound than the trumpet, which has a brighter, more aggressive sound. The cornet also has a shorter tubing length than the trumpet, making it easier to play high notes and trills. The trumpet has a larger bore size than the cornet, which gives it a greater range of sound. Additionally, the trumpet’s valves are more complex than the cornet’s, allowing for greater articulation and expression.