Let me say at the start that I am sure all three lines are excellent and that I am not looking for a flame war. These three lines have been recommended to me and have trips that look pretty similar, though not identical. I am looking at a round trip to/from either Vancouver or Seattle.
I have already seen some excellent info from Mike from Merced - thanks! Anyone who has experience or maybe can offer comparison of taking trips to Alaska on these three lines, let me know. In what ways might the experience be different? One thing I notice is size of ship. Another is that some trips seem to go open ocean to/from their start and end point (Princess from Seattle) and others go Inside Passage all the way to/from Vancouver. Does that matter a lot?