I guess this is one more data point: I read the story first, too, and liked it better than the film. The story ended with a certain ambiguity (in my mind, at any rate) that I took some time to think about, and which I enjoyed. The movie wrapped it all up a bit too neatly to my taste.

I watched the movie first, but enjoyed the written story more (though I still thought the movie was great!). The big difference for me was the inclusion of the physics in the written story, and how it was connected to the linguistics.