Compare Aimeos alternatives with the actual catalog size, product types, variants, attributes, price rules, stock sources, locales, currencies, taxes, checkout, payments, fulfillment, returns, and marketplace needs. Benchmark imports, search, cart, and order operations under realistic load. Inventory Laravel, TYPO3, or other host-framework integrations and custom extensions. Test a complete order plus cancellation and refund, including asynchronous failures. Migration planning must reconcile customers, products, inventory, orders, and accounting while preserving a rollback route.