10-040450-18S vs 10-40450-18S

The data sheet on both of these parts does not show a reference to 10-040450-18S at all, only the 10-40450-18S. The datasheet does not clarify any difference between these numbers, but one of our techs recently confirmed with Amphenol that these two part numbers are one and the same. The leading zero is omitted for ordering.