I would advise that it depends how you like to eat. If you tend to eat in the club lounge in the evening and not need to buy dinner, the Grand Hyatt will save money. If you always eat in a restaurant, this isn't a consideration.

Personally, I love the atmosphere of the Park Hyatt but the Grand Hyatt has a special place in my heart. It is nearly a year since I visited, so things might have changed. We received fantastic service there; the club lounge has well-chosen food and drink, and in our experience the pool is less busy.