The answer to the question is.....It all depends on the state of the sea at the time. There is not going to be any one cabin or spot on the boat that is comfortable if the seas are high. On the other hand, if it is flat, every cabin will be fine. The difference between cabin locations when it comes to movement night be less than 10%? You did mention however you were on a 62' cat, which I assumed to be a sailing vessel. Then you stated you would be motoring from spot to spot? If it is indeed a sailing vessel, it has been our experience that most sailing craft, mono or cat, are more stable when sailing than when motoring, giving more comfort to those who are prone to motion sickness.