In formal/academic writing, I see some people start a quote by using "someone says" and others "as someone says...". For example,
- Toni Morrison argues that "the process of organizing American coherence through a distancing Africanism became the operative mode of a new cultural hegemony." (8)
- As Toni Morrison argues, "the process of . . .
What's the difference between sentences 1 and 2? Is this a problem of style or does the meaning also differ?