I don't know...but one thing to consider:
When you sign up for the card you'll also get an e-certificate for one night free at a category 1-4 hotel. If you have the premier card, each year on your sign-up anniversary, you'll get an e-certificate for a free night at a category 1-5 hotel (certs expire 6 months after issue date, so you can't save 'em up). To me, those free nights more than cover the annual fee, so I've never worried about it. I look at it as paying $65 for a $200 dollar hotel room, and convince myself that it's more of a perk than a fee.