Rebecca is, of course, indebted to Jane Eyre in all sorts of consciously thematic and perhaps unconsciously associative ways, but the book has always maintained its own peculiar identity which puts it out of the category of mere imitation or 'tribute' fiction. Most important is du Maurier's tone, or rather that which she gives her own 'Jane': where Bronte's heroine is boldly certain and declarative, the 'I' who narrates Rebecca is self-effacing and habitually deferential, made clear by the singular device (which is also a dark joke) of keeping herself nameless throughout. The namelessness itself may trip readers into thinking that this will be an example of an unreliable narrative; but there is the important and almost never commented upon device of those first introductory chapters - a device unused in Jane Eyre, which proceeds in strict linear fashion - before the 'flashback' which takes up the rest of the story. This is no attempt to muddy the narratorial waters, much less to complicate the reader's point of view; rather, it is the second Mrs. de Winter's open declaration that the story of her own growth and disillusionment, while told from her own present-day understanding, must be gone through step by step from the moment she entered it several years before.
If you're into Mundane Fiction, read on.