There are many spoilers in the Fifty Shades of Grey book to movie comparison.
Plenty of other details were changed, of course, and feel free to remark on any changes you feel may have been more noticeable.
We could go on and on about the minutia of the changes between 50 Shades Darker on the big screen and within the pages of the book, but this list compiles the biggest changes I noticed during my screening of Universal’s 50 Shades Darker.
Do not delve in if you want the film to be a surprise.