Not sure how to post the link. When I put segments of the Ts & Cs through Google Translate, they both seem to be very close and I could not find anything that indicated that you must reside in the country you are booking through.
The cruise line is Hurtigruten and the price difference is between the USA website and the Norwegian website. I have not tried to actually book a cruise on either website so it is possible once I were to put in my contact information on the foreign website, the booking may not go through.
I was just curious if anyone knew if it was an issue to book through a foreign website or not. I sent for a quote to see if they would provide a different price than I was able to see online through the USA website, but I got the same price offer. Oh well, still considering options. Thanks all for the replies.