Originally Posted by tomsem
I have noticed that ePub supports the use of embedded fonts, but what other, specific technical advantages does ePub confer over mobi/AZW? Is there broader/deeper support for HTML/CSS? Are all ePub readers created equal, i.e. are some features 'optional' to implement?
ePub fully supports CSS 2.1 and I think almost all of XHTML. Mobi/AZW's CSS support is, what's the polite word, terrible. No support for float, almost all the box model fails, etc.
ePub also supports SVG. So the rendering capacity is much, much better. Basically it's quite difficult to do anything more design-intensive than a novel in Mobi. ePub gives you the chance to do almost anything (of course, you need a reading system to support it).