This is part of the snare drum part from Ravel's Miroirs No. 4: Alborado del Gracioso (The jester's aubade).
What is the effect of both sticks playing the same note? If the sticks coincide precisely how different is the sound from that produced by one stick only? Is it simply a bit muffled? If they don't coincide precisely why doesn't he write the first note as an acciaccatura?
He's such a good orchestrator I'm sure he knew what he wanted. But what DID he want?
(My first question btw.)