Catalogue & checkout
Gambio
Variantenartikel, Staffelpreise, unlimited products and vouchers are all evidenced, which is more than a flat list — but the payment story is 'PayPal & Co.', with no invoice, no direct debit and no buy-now-pay-later named, and for me that vagueness loses trade deals. No bundles, no guest checkout and no per-channel pricing in evidence; 'B2B' is a bare checklist word with no customer-specific price list behind it.
Shopware
The captured developer pages show a real variant model with parent-child inheritance and a configurator, hierarchical categories, multi-sales-channel availability, and a payment system built on extensible synchronous and asynchronous handlers — but customer-specific prices appear only in the top Beyond tier. I found no public information on bundles, tiered pricing, guest checkout, or invoice and direct debit as payment methods, which is the first thing a German trade buyer checks.