I have been in both. I personally prefer mermaid one, and I think most people would, but both are good.
Mermaid one has proper cabins and they are a little bit bigger than mermaid two since they are our more people on mermaid two then on mermaid one. Also mermaid ones trips can be a day or two longer than mermaid twos. Also to do go to more places. Mermaid one has a larger eating area of the mermaid two, and the mermaid to eating area, in addition to being a little cramped, it’s not very well air-conditioned.
I believe the dinghy is on mermaid two are a little bit larger than on mermaid one. Mermaid one has satellite Internet, and mermaid two does not, it has only a satellite telephone. Mermaid two does have a very nice kind of living room, air-conditioned, and more of mermaid twos decks are carpeted.
I would happily take either boat, but if I could choose between the two I would choose mermaid one
Bill