I disagree, Gayla ........ the mini cabins on both decks are the same, BUT ......
the balconies for those on the Dolphin deck are completely uncovered, with no protection from rain or too much sun, and are totally visible from the higher balconies, so there is no privacy. For most people, privacy is not a concern, but some do prefer protection from weather.
The minisuite balconies on the Emerald deck are fully covered, offering weather protection as well as privacy.