What's the difference between a passenger ship and a cruise ship?

If they are all in third class and leave at the same time, the difference between a general passenger ship (A) and a special cruise ship (B) is: 1: A is a 36-hour trip to Yichang, without stopping at any tourist attractions (only at the pier) and crossing the canyon in the middle of the night. The passengers are mainly locals, and the ship is more "that ……", so it is completely a means of transportation, 6-. 2: B is a chic one-stop tourist attraction, which takes 4 days and 4 nights to Yichang. Crossing the gorge during the day (what else do tourists see? ! ), of course, the ship is more luxurious (star-rated), with 6 people, air conditioning, separate toilet, 3 17 yuan (excluding tourist tickets). I don't know if I made myself clear.