Previously we advised you that the file size for Black Ops 3 on the Xbox One would be 45GB, PlayStation have now confirmed their file size for the PlayStation 4 to be a total of 43.6GB. So the two are extremely similar in size.
For those of you eagerly awaiting the opportunity to pre-download your game prior to release so you can avoid those over crowed servers, the pre-install date has been listed on the PlayStation store as October 30th.