"Where there is a real superiority of mind, pride will be always under good regulation." (11.18)
When Lizzy needles Darcy about his pride, he fights back: it's fine to have a big ego if you actually have the skillz to support it.
I was given good principles, but left to follow them in pride and conceit. (50.24)
Ooh, get out the highlighter, because this is the first time that Darcy admits some of his pride might not have been justified. In fact, it may have been a lot more like conceit.