“Snipcart Open” is ambiguous enough that a migration should start with product identification. Confirm the exact project, license, hosting model, and supported version; do not assume it is the same thing as Snipcart's hosted cart or that “open” means self-hosted.

Once identified, build a sandbox checkout with variants, tax, shipping, discounts, and payment failure. Trace the order into fulfillment and refund. Test API/webhook retries, customer notifications, and export of products and orders. Compare total cost and operational ownership with the existing store. The Snipcart documentation can help if this listing refers to that product, but verify the match first.

Do not move real customer or payment data into a trial. Preserve a rollback path for in-flight orders. A product-name mismatch is a bigger risk than a missing feature in a comparison table.