I tried the EPUBs
in post #17 in Amazon's Kindle Previewer to see how they would look. Both performed the same.
The image was displayed (large within the page margins) on one page and the caption by itself at the bottom of the next page. Conversion for Enhanced Typesetting failed due to code that does not meet the Amazon Kindle Publishing Guidelines, meaning that a book published with that code would be missing many of the newer Kindle reading features.