Manager::hasDifference

private function hasDifference(array $collectionsA, array $collectionsB)
{
	foreach($collectionsA as $i => $collectionA)
	{
		$found = false;
		foreach($collectionsB as $j => $collectionB)
		{
			if($this->isEqual($collectionA, $collectionB))
			{
				$found = true;
				unset($collectionsA[$i]);
				unset($collectionsB[$j]);

				break;
			}
		}
		unset($collectionB);

		if(!$found)
		{
			return true;
		}
	}
	unset($collectionA);

	return (bool)$collectionsB;
}