Is diaspora writing different from expatriate writing?

Answer 1

While I'm not familiar with the two forms of writing referenced in the question, I believe I can extrapolate an answer.

Take a look at the two different descriptors here: diaspora and expatriate. While both terms imply removal from one's native country, diaspora gives more the sense of being driven out, and expatriate lends itself more to a self-motivated migration.

By and large there should be no discernible difference between the two based on the labels. Any differences are likely the result of the source, the writers themselves.