"Not really, because I have read them, and consequently know they are both written in the first person."

By golly, you got me there; that never occurred to me. I assumed that you, following the common practice, were content to create the illusion of having read them, while in fact only having watched the Masterpiece Theatre interpretations. I stand corrected. You must concede, however, that the question of whether David Copperfield has read Great Expectations remains open.