The answer is that the offerings weren't identical. Each one was infused with the individual enthusiasm of the prince who brought it. Each one was permeated with the unique personality of its owner, his own personal devotion, his own spiritual striving. The orchestra is about to strike up the instantly recognizable opening bars of Beethoven's Fifth Symphony. The sound is like someone dragging his fingernails across a classroom blackboard, excruciating beyond words.
Music is an unforgiving thing.
It works totally encased within a closed system. One step outside the scale, outside the system, and our teeth are set on edge. Arguably, the greatest musician who ever lived was King David. In Psalm 119, David Hamelech praises Hashem. A mistake that led to the death of Uzza, the son of Avinadav.