Two cannonballs are shot in sequence from a cannon, into the air, with the same muzzle velocity,

Question:

Two cannonballs are shot in sequence from a cannon, into the air, with the same muzzle velocity, at the same launch angle, based on their trajectory and range, how can you tell which one is made of wood and which one is made of wood. If the same cannonballs were launched in vacuum, what would your answer