We stayed at the JW a couple years ago. Absolutely loved it. Everything about it was lovely. The staff was great and the grounds very nice. Loved the pool. We walked through the Casa Magna Marriott and wasn't as impressed with the pool, hotel or grounds. To be fair, we did not stay there but happy we choose the JW. You can walk back and forth between the 2 properties and use the restaurants. Not sure about using the pool. if you enjoy using the pool then go to the JW. Hope this helped!!