I converted your scrambled sample to mobi-both using calibre and used kindleunpack to verify that the converted file contained both mobi and kf8 formats. I emailed it to my Amazon account and as you described it was delivered to my Kindle (Oasis 2) as a mobi file.
I then converted the same book using Amazon's Kindle Previewer (v 3.28.1) and emailed the resulting mobi. In that case the book appeared on my Kindle in azw3 format as expected.
Quote:
Originally Posted by shalym
What is the advantage of side-loading a mobi-both via USB?
|
As far as I can see the main advantage is that you can use the same file regardless of what Kindle model you own. If you own multiple models it may simplify things.
Quote:
Originally Posted by shalym
Will I be able to sync my books across devices?
|
No. Only documents sent to your account will sync between devices.
Quote:
Originally Posted by shalym
If I'm going to side-load over USB, what makes this format better than using either kf8 or kfx or traditional mobi?
|
Formatting is different in each of those cases. Traditional mobi will not allow boldness selection for fonts. kfx will allow the most options, but has other potential disadvantages you can read about in the description of the KFX Output plugin.
Personally, I just convert using the Previewer and email to my account the few books that I obtain outside of the Amazon ecosystem. Syncing between devices is very import to me.