We have stayed at both and feel they are both very different. As mentioned, CTI is a high rise hotel and very small property. Everything is centered around the main hotel. We found the resort to be less romantic and didn't like the hotel feel of the resort. We also found small things like breakfast being loud and not as intimate as at CSS. CTI does not have the winding trails that we enjoyed exploring everyday.
It really boiled down to CTI not being our type of resort. We really loved CSS and have been to CN and honestly can't tell you which we like best. They are both fabulous.
If you are set on trying out CTI, I'd do what someone suggested and book a split stay. That way you are guaranteed to have a fabulous time at at least one of the resorts.
Juliann & Jeff
Jamaica Soon Come