Why RCL instead of DCL for DVCFan cruises?

I am sure no one will mind if I answer this? The folks at DVC Fan thoroughly researched and it was going to be approx 50% less money for the same week, same size ship, same itinerary with RCL for this DVC Fan cruise, than on DCL....I know if the cruise was on DCL my husband and I wouldnt have been able to fit it into the budget:(

Also, they worked hard to get us some private events, like trivia and karoke, etc and DCL wasnt as easy to work to get that accomplished.

Anyone offifical at DVC Fan please correct me if I'm wrong, etc