Quote:
Originally Posted by JSWolf
The reason for the difference in the spacing of the letters is because KFX supports kerning were KF8 does not support kerning.
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Actually nothing to do with KFX and KF8 files/formats. It's purely an Amazon decision on how the rendering is done. They could easily have any Kindle eink or App that supports KFX support the same features in KF8. The source is usually the same. See also epub2 vs kepub on the Kobo.
It's a marketing decision.