There were actually 2 different versions of The Stand. When it was originally published the publisher wasn't sure King was enough of a draw to warrant a 1000+ page tome, so they cut it down like 3 or 4 hundred pages. Later when King proved his staying power it was re-released at the previous 1000+ pages with some editing of the story line and restoring most of the lost pages.
And it added the most interesting/disturbing character. The Kid.