We recently stayed 5 nights at the Stellaris, but walked over to the Ritz one night for drinks at the bar and spent some time in the casino. The hotel itself is very nice and new, but it felt like a ghost town. We had our drinks out on the patio and it seemed that maybe a third or less of the rooms had lights on at 9pm. Even the casino was practically empty compared to the Stellaris casino. Walking by on the beach during the day, there were always palapas available and it seemed very calm and quiet (there are no water sports huts on the beach there). So it depends what you are looking for - if you want constant entertainment and lots of people around, go with the Stellaris. If you want serenity and quiet, go with the Ritz.