This was a pretty informative thread about the differences between kepub and epub:
https://www.mobileread.com/forums/sho...d.php?t=250953
These are some useful quotes from that thread:
Quote:
|
The only differences arise because the rendering engine is different for both. Kepubs are rendered through ACCESS (somehow an engine only included in Kobos) while epubs are rendered through Adobe RMSDK which is a standard in every single eReader but kindles (because it's needed to handle ADEPT DRM scheme used by nearly everybody but Amazon). Each renderer has its own set of little differences.
|
Quote:
These are the advantages of each format that I notice:
KePub (sideloaded):
* Quicker to respond to page turn gestures (especially tap gesture)
* Faster text selection (e.g. when highlighting large areas of text)
* Support for footnote previews
* Can double-tap to zoom images
ePub:
* Better hyphenation (kepub reader can hyphenate words in the wrong place if they have trailing punctuation)
* Full justification works properly (kepub reader doesn't properly justify some lines that contain certain common characters such as elipsis and mdash)
* Better support for embedded fonts
* Full-screen mode works without fonts being cut off
* Better word spacing when using full justification
(Apart from the last, all of these ePub advantages are due to bugs in the KePub reader.)
|
I think it makes sense that having different rendering engines could affect the speed of text selection and page turns.