I believe that there will be some differences in terms of the service standards and the products they offered onboard.(may be due to what the passangers demand for)
I was on the Rhapsody in last FEB and really felt that.
Super Star Leo 08/04/00;Star Pisces 08/12/01;
Omar II 2002; Star Pisces 06/08/04; Omar III 09/17/05;
Golden Princess 01/15/06; Star Pisces 07/09/06; SuperStar Aquarius 3D2N 07/06/07;
SuperStar Libra 3D2N 01/16/08; Rhapsody OTS 6D5N 02/08/08;
SuperStar Virgo 4D3N 05/18/08