Both facets of fiction depict an ultra-realistic or deeply unrealistic setting, albeit display factual elements and messages for which one living in the "real world" can relate to (author's note). Both take place in a world that could resemble the world we live in, but in an unrealistic manner. Dystopian fiction generally focuses on the location as it's science fiction-esque essence, but science fiction is more of a broader term.
EDIT: Both are used to describe a genre of fiction.
Hope this helped and please let me know if you have any other questions :)
I think that Hellen Keller was a very loud and outspoken person for someone her age and with her conditions. My thought about this is that it is what she uses to try and comunicate with other people to make sure that they would still notice her.
