I confirm this ... 6229 is (for Amazon) very faster!
Yes, I confirmed this too. 6229 says, very quickly downloading audio, then downloading video, then goes to processing.
6230 says, downloading video, then downloading audio, and then a longer processing time.
Yes, at least a whole extra minute, or more, when finished.
Streamfab*.exe is the one busy processing using both disk and CPU time.
I said before no reason why streamfab can't multithread download, but also download both audio and video at the same time.
Don't know why the change, nor was anything really mentioned in the changelogs other than the ability to get episodes of shows. These tests were done with movies.