<how does one edit a question after writing it? I see no option>
I just wanted to add, even an examples of indesign HTML exported web pages will be great. I assume that indesign can export the document to HTML since I saw many places on the net that talks about this, so I know it is possible.
Editing is done from the Actions dropdown in the lower left of the reply window. I really don't know how to answer your question but you can download a 30 day trial if ID and try it yourself.
Download InDesign Trial, learn it, then make your tests yourself. Be aware that if you know how to handle styles you will get complete different results. So the first thing you have to do, is to learn styles and no-gos, which are very important in HTML/EPUB export.
(No-gos are e.g. getting space between paragraphs with multiple return or shift return, hard line break, multiple spaces, etc.)
Then you have to know the limitations of HTML compared to PDF.