The main difference between ArrayBlockingQueue and LinkedBlockingQueue is that ArrayBlockingQueue is backed by an array, while LinkedBlockingQueue is backed by a linked list. This means that ArrayBlockingQueue has a fixed size, while LinkedBlockingQueue can grow as needed.

Another difference between ArrayBlockingQueue and LinkedBlockingQueue is that ArrayBlockingQueue uses a single lock, while LinkedBlockingQueue uses two locks. This means that ArrayBlockingQueue is more efficient than LinkedBlockingQueue, but it is also less scalable.