I would choose Kidani, but we would have a number of small children on a GV trip and would want to be close to the new pool. I would only choose Jambo if I could be on concierge, to get the Sunrise Safari (not sure there is a GV on concierge).
There are no GVs concierge. Jambo GVs are one story, whereas Kidani are two story with, I believe, the living area open to the second floor. Jambo units have the pool table. I don't think a person could go wrong with either one -- just have to try 'em both out!