- In the movie, Faramir sees the Ring and chooses to only consider the good that it might do, despite also seeing the manner in which the Ring twisted Gollum's mind. His mindset is "ends justify the means", and he willfully ignores the issue of the Ring's consequences. The extended edition of the movie includes other scenes that show a deep rift between Faramir and his father due to favoritism for his brother. Faramir allows this pain to control his reaction to the Ring's temptation, acting out of that instead of acting out of a clear-headed appreciation of the importance and danger of the Ring. He feels that he must earn love. Instead of turning away from the Ring immediately, he keeps it close to him for a while until later circumstances force him to observe the dark truth of what the Ring is.
- In the book, Faramir is highly-principled, perceptive, and wise. He recognizes that both the Ring and Frodo's quest are beyond his authority to control. Although he could take the Ring by force, he manages to learn from his brother's mistake rather than repeating it. He doesn't need to entertain the thought of the Ring's power for very long before rejecting it. He lets it go.
(I have listened to the commentary and interviews about the movie. I realize that the book version would have reduced the seductive power of the Ring in the eyes of the audience, and the detour to Osgiliath furnished an effective and exciting climax to Frodo's storyline in the second movie. It raises a secondary question that's also interesting: like the movie's portrayal of the Ring, do you see temptation as close to irresistible for any mere man? Or closer to the book's portrayal of the Ring, do you see temptation as conquerable by any mere man, so long as he refuses to give it a foothold in his mind? To be fair, it's notable that in the first movie, both Aragorn and Gandalf succeed in leaving the Ring with Frodo when he offers it willingly.)