Hiya. Sections like the one you're talking about need sourcing for any information added. This both establishes that the differences listed are not original research and that they are not trivial. Wikipedia is not IMDb; when we list such things, we should focus on the ones that are considered significant in some manner (i.e. every film based on a book will have differences), and we establish that by referencing a reliable source for the difference. Hope this clears it up!