Got an interview from an application with the old version of my resume.. Do I bring the new one or keep the old one?

I have an all-day interview on Monday for a job I applied for with my old, substantially less attractive resume. The work and education histories are the same but the bullets under the job titles are much more achievement oriented and better worded. I omitted one of my accomplishments under a key job in my work history and replaced it with something similar (and more realistic..).

Anyways, I'm assuming I should bring my resume or a few copies of my resume to the interview.. So should I bring the old one or my new one?

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