You'll probably find the price per cabin is the same. The cruise lines divide the cabin cost by four unless they advertise 3/4 sail free, then the cruise line divides the cost by two.
Example: if a cabin, hypotheticall is $4000, the usual price is $1000 per person if their are four passengers. If the cabin is advertised as 3/4 sail free, then the price is divided by two and the price is $2000 per person. All the cruise lines do something similar.