Hi Patrick, all of the marketplace pages give you information about the products you're looking at, so ultimately the best way to see what the differences are is to read the accompanying description on the page. In the case of the two
currently available child themes for Vantage, both are created by the same marketplace developer (not AppThemes), so you're welcome to comment on their marketplace page to receive further details if you like, as they can provide the best clarification about their products. Thanks.