It seems any with the stars on are lower.
For some reason the potential for 4 people are the lower price, 2 person only cabins are the higher price. As cruise1957 suggests, it looks like they’re cheaper as they can accommodate more people and rather than the old way of offering 3rd and 4th persons at a reduced % price, now the price is just lower. Odd!
I can’t see that there’s any downside to the cheaper rooms but I’m still suspicious!