[hapax legomenon]

I know kindle supports mobipocket and so does cybook. I own a cybook and am self-publishing a creative commons erotic short story collection (which I'll be posting here in a few weeks).

Will mobipocket render exactly the same in both kindle and cybook? What are the differences (if any) in how kindle and cybook show mobipocket files?

I'm thinking mostly about navigation, headings and fonts. I'm guessing that images will be basically the same.

Would there be any reason to produce mobipocket versions for each device?

Thanks for your help.