I think Faramir would definitely have held out longer than Boromir, but would have eventually tried to take the Ring. However, I don't think his motives would have been the same. Boromir wanted the Ring to save Gondor. Faramir knew that the Ring was too evil and corrupting to take home. I think given Faramir's soft heart and pity for Frodo he would have tried to take the Ring "to spare Frodo."
Faramir: "Give me the Ring! It's too much of a burden for you. I'll take it to Mount Doom for you!"
Of course, once it was in his hand, the Ring would have had him take it directly to Sauron.
I disagree with the idea that Faramir would have been tempted to take the Ring to Denethor. The whole "wanting Dad's love" thing was purely movie tripe. Yes, Faramir wanted Denethor's respect, but for the things he was already doing. He didn't do things
in order to get that respect.
Book Faramir: "I did the right thing, why don't you respect me?"
Movie Faramir: "What dumb thing shall I do to earn a crumb of affection?"
-Lily