I’m thinking that that other quote is a paraphrased version of the answers she gives in the interview that’s on this page: http://blogcritics.org/video/article/in-the-comic-con-2012-pressroom/page-2/ Not quite exactly word for word, but closer than the previously posted quote:
Do you think that Belle will try to change Rumple’s dark ways?
I don’t think she assumes she’ll be able to create a completely different person out of this guy who obviously has a lot of troubles, shall we say. But I think more to the point of actually bringing out the light side of him, and the side that is there that has just been hidden away. She believes she can do that, and hopefully she can.
Will she change to be a darker person?
Who you’re with and who you spend time with obviously affects who you are as a person too, so I’d imagine there’s going to be a certain amount of balance brought back to her maybe, of um, not a dark side maybe, but a side that’s a little less “Belle predictable”, maybe not as optimistic as she usually is about life.