Catalogue & checkout
JTL-Shop
Everything the evidence offers on the selling side is 'unbegrenzte Artikel' and 'Integrationen zu allen beliebigen Payment-Anbietern' — not one word on variants, bundles, tiered pricing, guest checkout, vouchers or German payment habits like invoice and direct debit. For a shop product, checkout evidence this absent is information: I cannot credit conversion features nobody documented.
Shopware
The variant machinery is genuinely worked — parent-child inheritance, a configurator object over property groups, unlimited properties with filtering — and the payment architecture with synchronous and asynchronous handlers plus a redirect URL returned in the headless API response shows a checkout built to be extended. But I found no public information on bundles, guest checkout, promotions or vouchers, the only payment provider named anywhere is PayPal, and customer-specific prices surface only on the top Beyond plan — good machinery with the conversion features unproven on the captured pages.