No it isn't. The thread you linked was about the movie, and is two months old. This thread is about the history of the actual event.
You might ask someone to read the two to you so you can compare them.
Here's the first paragraph from this one:
This September marks the 150th anniversary of a terrible episode in the history of The Church of Jesus Christ of Latter-day Saints. On September 11, 1857, some 50 to 60 local militiamen in southern Utah, aided by American Indian allies, massacred about 120 emigrants who were traveling by wagon to California. The horrific crime, which spared only 17 children age six and under, occurred in a highland valley called the Mountain Meadows, roughly 35 miles southwest of Cedar City. The victims, most of them from Arkansas, were on their way to California with dreams of a bright future.
And the first paragraph from the one Utah Girl posted several months ago, and I linked, which you say is different:
This September marks the 150th anniversary of a terrible episode in the history of The Church of Jesus Christ of Latter-day Saints. On September 11, 1857, some 50 to 60 local militiamen in southern Utah, aided by American Indian allies, massacred about 120 emigrants who were traveling by wagon to California. The horrific crime, which spared only 17 children age six and under, occurred in a highland valley called the Mountain Meadows, roughly 35 miles southwest of Cedar City. The victims, most of them from Arkansas, were on their way to California with dreams of a bright future.
And, the last from each ( you tell me which is which):
8. John D. Lee, “Lee’s Last Confession,” San Francisco Daily Bulletin Supplement, Mar. 24, 1877.
8. John D. Lee, “Lee’s Last Confession,” San Francisco Daily Bulletin Supplement, Mar. 24, 1877.
I await your retraction and apology.
Par35 is correct. I posted this a couple of months ago, when the article became available. The articles are the same, click on the links and they both go to the same article on lds.org.