There seem to be much more changes, even that is probably the most important one.
Time Turners don't work the same (in canon, there is no hard limit on 6 hours, it just becomes exponentially dangerous if you try that), the Sirius Black/Pettigrew thing doesn't turn out the same at all, the Free Transfiguration stuff doesn't seem to work the same, ...
And as others mentioned, Voldemort is much more competent.
This is a new thread to discuss Eliezer Yudkowsky’s Harry Potter and the Methods of Rationality and anything related to it. This thread is intended for discussing chapter 119.
Plans for next chapter release:
There is a site dedicated to the story at hpmor.com, which is now the place to go to find the authors notes and all sorts of other goodies. AdeleneDawner has kept an archive of Author’s Notes. (This goes up to the notes for chapter 76, and is now not updating. The authors notes from chapter 77 onwards are on hpmor.com.)