So, I read what the creator of the mod had to say and looked at all of the comparisons and explanations of the scenarios, and everything seemed like it was indeed very similar, but at the end of the article, the creator says that people should give Autumn Leaves a try if they "want to play a 'Whodunit', but with entirely different themes, different writing, different plot, different music (!) different voice acting (!!)." I haven't played either the DLC or the mod, so I don't know if the bit about the different themes, plot, and writing is sarcasm, or if the scenarios that showed up in Brain Dead are the only instances that appears to be ripped wholesale from Autumn Leaves.
Can anyone speak to what, if anything, is different between the two, and how much is different? It sounds like BD is shorter, so even if everything else is different, that would mean a good chunk of it would be derivative, which would be something taken into account in any possible court hearings.