Extended Essay: Jane Austen and Charlotte Bronte?

I'm writing my extended essay for IB on literature, and seeing as I've read quite a few classics, decided I'd like to focus on books from that era. I'm considering the following question:
How are class conflicts portrayed in Jane Austen's Persuasion and Charlotte Bronte's Jane Eyre?

I'm wondering if the two books/authors aren't too dissimilar to compare, or if I had better stick with one or the other. I considered doing a compare/contrast of the same topic with Pride and Prejudice and Persuasion, but thought this a little more original, since many, many extended essays have been done on Austen. Any insights would be much appreciated!

I have found that there ae similarities between P&P and Jane Eyre. Certainly where the Reeds are concerned and where Rochester and Richard Mason could be seen as Bingley and Darcy. Not as friends as such, but as two men who are very dissimilar on the surface, but similar in their deeper regions... More than Rochester wants to give into. (More in The cousins-thread on the Jane Eyre-forum)

But Persuasion might be more interesting towards the heroine herself... Particularly maybe the part after Jane has left him...