What is Difference Between Featured Image and Listing Logo ?
Listing Logo will show on your listing detail page as a logo. And you can upload it from the submit listing page.
Listing Logo is only shown on Listings / Restaurants Listing Types Detail pages
Featured Image will show on the listing as a listing image. In the search result page, listings will with their image is called a feature image. And you can upload from the submit listing page and will be displayed on the homepage if you are using ET Listings Element.