Spot and follows
In the article about the I-35W shooting, the updated lead has more information about the man wounded in the shooting. In the original, the lead was about two lanes on the freeway being closed. This new lead not only informs the reader that a man was injured but also that the shutdown lasted longer than two hours causing traffic to back up for miles.
The updated story is filled with details whereas the original was bare boned. There were no real details other than the shooting happened in the original and in the new there is information about the shooting victim, the scene the shooting created, and attributions from witnesses. This forwards the news and gives the reader a fuller, more complete picture.