spot and follows
The two leads are different in that the second day lead has more detail than the first day lead. In the main news story some of the information from the first day is summarized a lot more to make room for the more detailed information that surfaces in the day story. The second story gives updates on the victims conditions and also the information that has been given out by the police. It also has a few more quote sources that are worked into the story. The second-day story is not a response to a competing news organization, it is a follow up to a story by this organization that appeared earlier on. They build on their own information, and in this case do not directly site any outside competing sources.