Don't know about the room itself (unlikely it's much nicer), but having club access for a family of four is worth it for $66/day if you use it. You'll spend that for breakfast alone in the restaurant when there's a decent breakfast served in the club every morning. Not to mention snacks in the day, water bottles for taking around town, and heavy enough hor d'oeuvres/salads in the evening (that can either be a meal themselves on a night or two in or supplement with a pizza up from the place in the open air market across the street - they'll let you bring it in the club). My wife and I had my 2, 5, and 7 year olds there last summer and made heavy use of the club.

Not to mention that the club itself is one of the nicer in the US, on a high floor with nice views. Also, a club room should be in the same tower as the club and be on a high floor. So you're more likely to get a high level floor if you want that. You might be able to save a few $$$ to see if they'll give you club access without a club level floor, but probably not worth the hassle.