I don't think so. Moreover, I believe most undervalued books are Emma and Mansfield Park. IMHO

I think it's possible, but it's still pretty well loved. I sure love it to bits just like Pride & Prejudice (maybe a teensy bit less but I have major love for both).

Of course not. There can never be another novel like P&p.

Pride & Prejudice doesn't just overshadow Sense & Sensibility--it overshadows pretty much all of Jane Austen's other novels. (And Sense & Sensibility itself can overshadow Austen's other works, too.)

Possibly, but I think it can be looked at in two different ways...

One of them is this. Pride and Prejudice is the more famous/popular one and so it overshadows Sense and Sensibility (and like Pseudonymous has already said, it kind of overshadows all of her other work). So there's that way of looking at it.

The second way: Pride and Prejudice is such a huge success that its fame can actually be used to sell her other novels and make them better known to people who are otherwise unfamiliar with her lesser known books.