However, the other is not a press release. So ... whatever.
The best way to see which came first is to look at the post IDs: 20167106 < 20169125. Or, look at pages other than the front page or /item. For example: https://news.ycombinator.com/submitted?id=cdepman. Those always show the original timestamp.
Sorry for the confusion, but it's the only way we've found to balance the various concerns that apply there.
Edit: sorry, this should have been the link for the story. Would a mod mind swapping out the post's link?