Page Comparison

Consumer ID and Partner ID for authorization (the US)

Walmart deprecated Digital Signature based Authentication on the US Marketplace and excluded Consumer ID data from Developer Center. New OAuth based Authentication implies using Client ID and Client Secret. These API credentials have a dynamic nature and need to be complemented with a static seller identifier to authorize M2E Pro on Walmart correctly. 

To get around this situation, you can use either Consumer ID or Partner ID when authorizing M2E Pro on US Walmart Marketplace.

Walmart Product ID (GTIN, EAN, UPC, ISBN) exemption

The feature allows listing Items on Walmart without UPC/EAN. It will be useful for you if you're selling products with a Private label.