Hi I did some checking after reading your post and found that in some cases NCL was higher and that in some cases it wasn't. The cruises all cost the same for 7 days
but were leaving from different ports and were going to different ports. The cost at
each port varies by state and country you call in, so it could be that the taxes and
port charges are differnent there fore you cruse cost will be differnent and it may have to do with the web site you use also. Just my thought not saying I'm right,
some long time cruisers or TAs may be able to clarify it better.