What are the differences between the two passages the story of my life by Helen Keller and narrative of the life of Frederick Douglass an American slave?

Helen Keller's The Story Of My Life has many differences one is that Helen Keller talks about being blind and learning what things or called. this was difficult to do because Helen Keller is dump, deaf, and blind .In Frederick Douglass's story it talked about being a slave and trying tolearn how to read and write while master Hugh's wife strongly disagrees.