When comparing the total price for a cruise, I always include the drinks package price to get the overall cost of the cruise. It would be much easier if they had a set price like Princess & MSC.
I compared my last cruise to Norway on Princess with the same 7 day cruise on Anthem. Without the drinks package , Anthem was cheaper, but when you added on Drinks package, Gratuities & Wifi, the Princess price came in around £500 cheaper with the Plus package for the 2 of us..