The one thing to look at in this snippet is how Austen expresses a heightened emotion (shock, displeasure, disappointment) in a way that still manages to sound dignified and detached. It's really about the word 'what':
- What a contrast between him and his friend!
- It was a big contrast between him and his friend.
And the circumlocution:
- What a contrast with his friend!
- What a contrast between him and his friend!
How can you heighten your fragment while still sounding dignified?