Originally Posted by DiapDealer
That doesn't line up with my experience at all. My MOBIs are almost always smaller than their ePub counterparts—granted, images aren't a big part of what I do, but still.
If you wouldn't mind could you give me an idea of how your work flow goes?
I do everything in code view of Sigil, so I'm sure there is no bloat there. I go directly from Sigil to Calibre and do the EPUB To MOBI convert with standard settings.