They're just different enough that I'd let it go. There are movies I adore which I don't watch much - The Usual Suspects is not the same film on second viewing. It's still great, but there isn't that suspense; the big reveal doesn't have the same impact.
I think the film I've watched most is Alien. It's a wonderful horror movie - a genre I don't much care for usually. It builds tension slowly and releases it very well. It's such a shame that the most recent Alien films have been such dogs.