I think a interesting thesis for these two speeches would be the way the structure, weighting of different conventions and content is determined by the context of the speech and how receptive the audience may be. I mean Deane's is a romp in the park as far as speaking to a receptive, responsive and like-minded audience is concerned. He spends, compared to Sadat, very little time accounting for himself, his credentials and his motivations. Also, there is a forceful element of 'convincing' required by Sadat speaking to the Knesset which of course is not a burden in Deane's context. So yes, they both talk about unity but their context necessitates that they approach it in very different ways.
