Originally Posted by Gazella20
Is there a difference between the two formats? I have a Kindle and I tend to convert my ePub ebooks to MOBI with Calibre. Should I start converting them to AZW3 since it's Amazon's format for the Kindle? Is the AZW3 format better for the Kindle?
KF8 is basically the Amazon Kindle version of the ePub format, so it is much closer to the ePubs you are converting than the older mobi7 format. Thus converting ePub to KF8 is less likely to result in loss of formatting.