Catalogue & checkout
OXID eSales
Merchandising and B2B pricing are genuinely strong — per-category filters with campaign quick filters built without a developer, customer-specific price lists with tiers and discount logic, and five named payment integrations including Unzer and Adyen. I found no public information on a variant matrix, product bundles, guest checkout, or invoice and direct debit as named methods, so I cannot take this to the level a full catalogue conversion story would need.
PrestaShop
PrestaShop 9.2 ships a native one-page checkout with developer documentation for making modules and themes compatible with it, which is a genuine conversion feature. Beyond that I found no public information on variants, bundles, tiered or customer-group pricing, guest checkout, or which payment methods sit inside that checkout. A checkout I can see on one page but cannot price or pay through on paper sits in the low band.