Catalogue & checkout
Gambio
Variants, tiered pricing, vouchers, B2B and unlimited categories are all listed in the features, but checkout specifics stop at 'Zahlungsabwicklung mit PayPal & Co.' — no invoice, no direct debit, no guest checkout, no bundles evidenced. That sits between the 3 and 5 anchors: more than a flat list, less than the payment spread a German shop needs.
Shopware
Variants are properly modelled — parent-child inheritance, a configurator assembled for each variant product, hierarchical categories — and payments sit on a documented handler architecture with synchronous and asynchronous flows, PayPal the one provider named. We found no public information on bundles, tiered pricing, guest checkout, or German-standard payment methods such as invoice and direct debit; customer-specific prices appear only in the Beyond tier. The checkout is clearly extendable, but the conversion machinery itself is not evidenced.